{"id":45298,"date":"2020-10-15T00:00:00","date_gmt":"2020-10-15T00:00:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/gc-ms-analyse-von-phthalaten-vergleich-der-performance-stationarer-phasen-fur-die-gaschromatografie\/"},"modified":"2025-12-16T20:26:47","modified_gmt":"2025-12-16T20:26:47","slug":"gc-ms-analyse-von-phthalaten-vergleich-der-performance-stationarer-phasen-fur-die-gaschromatografie","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/de\/anwendungshinweise\/gnan2380-de\/gc-ms-analyse-von-phthalaten-vergleich-der-performance-stationarer-phasen-fur-die-gaschromatografie","title":{"rendered":"GC-MS-Analyse von Phthalaten"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Zusammenfassung<\/h2>\n\n\n\n<p>Phthalate sind in der Umwelt weit verbreitet und haben aufgrund ihrer potenziell sch\u00e4dlichen Auswirkungen f\u00fcr die menschliche Gesundheit Beachtung gefunden. Der Nachweis und die Trennung von Phthalaten ist deshalb zu einer Notwendigkeit geworden. Die Gaschromatografie ist eine effektive Methode zur Trennung von Phthalaten, die mit verschiedenen Detektionsverfahren wie Elektroneneinfang (ECD), Flammenionisation (FID) und Massenspektrometrie (MS) gekoppelt werden kann. In der vorliegenden Studie wurde die Methodenoptimierungssoftware Pro EZGC eingesetzt, um die optimalen station\u00e4ren Phasen und Bedingungen f\u00fcr die GC-MS-Analyse von Phthalaten zu bestimmen. Die Trennung der Phthalate wurde auf sieben verschiedenen station\u00e4ren Phasen verglichen: Rtx-440, Rxi-XLB, Rxi-5ms, Rtx-50, Rxi-35Sil MS, Rtx-CLPesticides und Rtx-CLPesticides2. In allen F\u00e4llen wurden 18 EPA- und EU-gelistete Phthalate in weniger als 6 Minuten analysiert. Zus\u00e4tzlich wurde eine erweiterte Liste von 37 Phthalaten unter Verwendung einer optimierten Methode in weniger als 40 Minuten analysiert. Sowohl Rtx-440, eine nur von Restek erh\u00e4ltliche Phase, als auch Rxi-XLB S\u00e4ulen zeigten die beste Aufl\u00f6sung des komplexen Phthalat-Gemisches.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Einf\u00fchrung<\/h2>\n\n\n\n<p>Phthalate werden in gro\u00dfem Umfang als Weichmacher in unterschiedlichen Industrieprodukten verwendet. Einige Phthalate gelten jedoch als endokrine Disruptoren [1] und werden mit einer Reihe von Problemen in Verbindung gebracht, darunter angeborene Fehlbildungen [2], Bluthochdruck bei Kindern [3], durch Bluthochdruck hervorgerufene Herzerkrankungen w\u00e4hrend der Schwangerschaft [4], Atemwegsst\u00f6rungen [5] und Fettleibigkeit [6]. Die Europ\u00e4ische Union (EU) und die Umweltschutzbeh\u00f6rde der Vereinigten Staaten (U.S. EPA) haben die Verwendung der sch\u00e4dlichsten Phthalate eingeschr\u00e4nkt (Tabelle I).<\/p>\n\n\n\n<p>GC-MS ist eine h\u00e4ufig verwendete Methode zur Analyse von Phthalaten, da sie einfach, schnell und kosteng\u00fcnstig ist. Die GC-MS-Methode liefert au\u00dferdem massenspektrometrische Informationen und bietet damit eine leistungsstarke Ger\u00e4teplattform zur Identifikation der Phthalate. Die Verwendung einer GC-S\u00e4ule mit guter Trennleistung ist wichtig, weil die massenspektrometrische Identifikation und die quantitative Bestimmung aufgrund der strukturellen \u00c4hnlichkeiten der Phthalate schwierig sein kann. So ist vielen Phthalaten ein Basispeak-Ion (m\/z 149) gemeinsam, was die Identifikation und Quantifizierung von koeluierenden Phthalaten erschwert. Gemische technischer Qualit\u00e4t und Isomere machen das Problem noch komplizierter.<\/p>\n\n\n\n<p>Eine k\u00fcrzlich ver\u00f6ffentlichte Abhandlung gibt einen \u00dcberblick \u00fcber die am h\u00e4ufigsten verwendeten GC- und LC-S\u00e4ulen f\u00fcr die Phthalat-Analyse [7]. Gem\u00e4\u00df der vorliegenden Literatur bietet die GC-MS eine bessere Aufl\u00f6sung f\u00fcr die Phthalat-Analytik als die LC-MS. Die am h\u00e4ufigsten verwendeten GC-S\u00e4ulen in absteigender Reihenfolge ihrer Beliebtheit sind 5er, XLB-, 35er, 17er, 50er und 1er Phasen. Die auf einer station\u00e4ren Phase erzielte Trennung l\u00e4sst sich durch Anpassung der Ger\u00e4tebedingungen verbessern, aber das kann im Labor ein zeitaufw\u00e4ndiges Verfahren sein. Mithilfe der Methodenoptimierungssoftware Pro EZGC lassen sich die GC-Parameter (z. B. Tr\u00e4gergastyp, Flussrate, Temperaturprogramm, S\u00e4ulenabmessungen und Vors\u00e4ule) schnell optimieren, um die k\u00fcrzest m\u00f6gliche Analysezeit f\u00fcr eine gegebene station\u00e4re Phase zu realisieren. In dieser Untersuchung wurden f\u00fcr 37 Phthalate (Tabelle II) Bibliotheken f\u00fcr die folgenden sieben station\u00e4ren Phasen f\u00fcr das Pro EZGC-Programm erstellt: Rtx-440, Rxi-XLB, Rxi-5ms, Rtx-50, Rxi-35Sil MS, Rtx-CLPesticides und Rtx-CLPesticides2. Diese station\u00e4ren Phasen wurden zur Analyse von sowohl regulierten als auch unregulierten Phthalaten ausgewertet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Verwendete Chemikalien<\/h2>\n\n\n\n<p>Das Phthalatester-Gemisch f\u00fcr EPA-Methode 8061A von Restek (Art.-Nr. 33227), Das Phthalatester-Gemisch f\u00fcr EPA-Methode 8061A von Restek (Art.-Nr. 33227), das 15 der gew\u00fcnschten Analyten in einer Konzentration von jeweils 1000 \u03bcg\/mL enth\u00e4lt, wurde als prim\u00e4rer Referenzstandard verwendet. Als interner Standard wurde Benzylbenzoat&nbsp; (Art.-Nr. 31847) verwendet. Alle anderen Phthalat-Standards wurden von Chem Service bezogen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ger\u00e4t<\/h2>\n\n\n\n<p>Die GC-MS-Analytik wurde auf einem Shimadzu QP2010 Plus GC-MS durchgef\u00fchrt. Das Ger\u00e4t war mit einer der sieben Restek-S\u00e4ulen (je 30 m x 0.25 mm x 0.25 \u00b5m bzw. 0.20 \u00b5m f\u00fcr die S\u00e4ule Rtx-CLPesticides2) best\u00fcckt. Die Windows-basierte Software Pro EZGC wurde verwendet, um die optimalen Bedingungen f\u00fcr jede S\u00e4ule festzulegen. Anschlie\u00dfend wurden alle S\u00e4ulen direkt miteinander verglichen, indem die Proben einheitlich unter genau den Bedingungen analysiert wurden, die die insgesamt beste Trennleistung ergeben hatten. Dieser direkte Vergleich liefert ein besseres Verst\u00e4ndnis der Selektivit\u00e4tsunterschiede zwischen den einzelnen S\u00e4ulen. Detaillierte S\u00e4ulenbeschreibungen und die experimentellen GC-MS-Parameter sind in den Tabellen I und III angegeben.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Probenvorbereitung<\/h2>\n\n\n\n<p>Die Standards wurden in Methylenchlorid gel\u00f6st und verd\u00fcnnt. Standardl\u00f6sungen wurden hergestellt mit 50 \u03bcg\/mL (bzw. 80 \u03bcg\/mL f\u00fcr den internen Standard Benzylbenzoat). W\u00e4hrend der Probenvorbereitung wurde die Verwendung von Plastikteilen sorgsam vermieden; alle Vorbereitungsarbeiten wurden mithilfe von Glasger\u00e4ten (Messkolben, Spritzen, Fl\u00e4schchen usw.) durchgef\u00fchrt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a><\/a>Ergebnisse und Diskussion<\/h2>\n\n\n\n<p id=\"figure-I\">F\u00fcr Phthalate, die von der EPA und der EU reguliert werden, wurde ein direkter Vergleich der S\u00e4ulentrennleistung durchgef\u00fchrt. Retentionszeiten f\u00fcr Phthalate auf sieben verschiedenen Phasen wurden vom Pro EZGC-Programm unter identischen GC-Bedingungen vorhergesagt. Die in Tabelle I gezeigten Bedingungen lieferten die insgesamt besten chromatografischen Ergebnisse von allen Setups, die f\u00fcr die einzelnen S\u00e4ulen optimiert worden waren. Als koeluierend wurden Substanzpaare mit einer Aufl\u00f6sung von weniger als 1.5 definiert. Die Gesamtanalysezeit betrug weniger als 6 Minuten. Zur Best\u00e4tigung der durch die Pro EZGC-Software vorhergesagten Retentionszeiten wurden Chromatogramme f\u00fcr jede station\u00e4re Phase unter den gleichen Bedingungen wie bei der Software aufgenommen (<a href=\"#figure1\" data-type=\"internal\" data-id=\"#figure1\">Abbildung 1<\/a>). Da die S\u00e4ulenl\u00e4ngen im Gegensatz zur Simulation nicht exakt 30 m betrugen, zeigten die absoluten Retentionszeiten geringf\u00fcgige Abweichungen von den vorhergesagten Werten; die Elutionsreihenfolge und die koeluierenden Substanzpaare stimmten jedoch exakt mit den Vorhersagen \u00fcberein. Die S\u00e4ulen Rtx-440, Rxi-XLB, Rtx-CLPesticides und Rxi-35Sil MS erreichten Basislinientrennungen f\u00fcr alle EPA- und EU-gelisteten Phthalate. Die beiden Isomere des Bis[4-methyl-2-pentyl] phthalats lie\u00dfen sich auf keiner der sieben Phasen trennen. Die Elutionsreihenfolge auf den S\u00e4ulen Rtx-440, Rxi-XLB, Rtx-CLPesticides und Rxi-5ms war vergleichbar.<br>.<\/p>\n\n\n\n<p><strong>Tabelle I:<\/strong>&nbsp;Vorhergesagte Elutionszeiten f\u00fcr regulierte Phthalate auf verschiedenen GC-S\u00e4ulen von Restek<\/p>\n\n\n\n<p>S\u00e4ule: 30 m x 0.25 mm x 0.25 \u03bcm (0.20 \u03bcm f\u00fcr die Rtx-CLPesticides2-S\u00e4ule)<br>Konstante Lineargeschwindigkeit: 66.7 cm\/sec<\/p>\n\n\n\n<p>Ofen: 200 \u00b0C (0.5 min), auf 330 \u00b0C (320 \u00b0C f\u00fcr Rtx-50) mit 30 \u00b0C\/min (1 min)<\/p>\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th rowspan=\"2\"><strong>Peak Nr.<\/strong><\/th>\n<th rowspan=\"2\"><strong>Bezeichnung<\/strong><\/th>\n<th rowspan=\"2\"><strong>Gelistet in<\/strong><\/th>\n<th colspan=\"7\"><strong>Retentionszeit (min)<\/strong><\/th>\n<th rowspan=\"2\"><strong>CAS Nr.<\/strong><\/th>\n<th rowspan=\"2\"><strong>Reinheit<\/strong><\/th>\n<\/tr>\n<tr>\n<th><strong>Rtx-440<br \/>(Art.-Nr. 12923)<\/strong><\/th>\n<th><strong>Rxi-XLB<br \/>(Art.-Nr. 13723)<\/strong><\/th>\n<th><strong>Rtx-<br \/>CLPesticides<br \/>(Art.-Nr. 11123)<\/strong><\/th>\n<th><strong>Rxi-35Sil MS (Art.-Nr. 13823)<\/strong><\/th>\n<th><strong>Rtx-50<br \/>(Art.-Nr. 10523)<\/strong><\/th>\n<th><strong>Rxi-5ms<br \/>(Art.-Nr. 13423)<\/strong><\/th>\n<th><strong>Rtx-<br \/>CLPesticides2<br \/>(Art.-Nr. 11323)<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Dimethylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority<\/td>\n<td>1.28<\/td>\n<td>1.16<\/td>\n<td>1.14<\/td>\n<td>1.29<\/td>\n<td>1.46<\/td>\n<td>1.10<\/td>\n<td>1.23<\/td>\n<td>131-11-3<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Diethylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>1.54<\/td>\n<td>1.39<\/td>\n<td>1.33<\/td>\n<td>1.55<\/td>\n<td>1.73<\/td>\n<td>1.30<\/td>\n<td>1.47<\/td>\n<td>84-66-2<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Benzylbenzoat<\/td>\n<td>Internal Standard<\/td>\n<td>2.11<\/td>\n<td>1.87<\/td>\n<td>1.56<\/td>\n<td>2.17<\/td>\n<td>2.31<\/td>\n<td>1.70<\/td>\n<td>1.88<\/td>\n<td>120-51-4<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>Diisobutylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>2.25<\/td>\n<td>2.04<\/td>\n<td>1.88<\/td>\n<td>2.21<\/td>\n<td>2.34<\/td>\n<td>1.91<\/td>\n<td>2.10<\/td>\n<td>84-69-5<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>Di-n-butylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority<\/td>\n<td>2.58<\/td>\n<td>2.33<\/td>\n<td>2.10<\/td>\n<td>2.53<\/td>\n<td>2.69<\/td>\n<td>2.17<\/td>\n<td>2.38<\/td>\n<td>84-74-2<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>Bis(2-methoxyethyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>2.74<\/td>\n<td>2.48<\/td>\n<td>2.26<\/td>\n<td>2.86<\/td>\n<td>3.10<\/td>\n<td>2.27<\/td>\n<td style=\"background-color: #c6d9f0;\">2.63<\/td>\n<td>117-82-8<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>Bis(4-methyl-2-pentyl)phthalat-Isomer 1*<\/td>\n<td style=\"background-color: #c6d9f0;\">EPA 8061A<\/td>\n<td style=\"background-color: #c6d9f0;\">2.85<\/td>\n<td style=\"background-color: #c6d9f0;\">2.62<\/td>\n<td style=\"background-color: #c6d9f0;\">2.37<\/td>\n<td style=\"background-color: #c6d9f0;\">2.71<\/td>\n<td style=\"background-color: #c6d9f0;\">2.83<\/td>\n<td style=\"background-color: #c6d9f0;\">2.50<\/td>\n<td style=\"background-color: #c6d9f0;\">2.64<\/td>\n<td>84-63-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>Bis(4-methyl-2-pentyl)phthalat-Isomer 2*<\/td>\n<td style=\"background-color: #c6d9f0;\">EPA 8061A<\/td>\n<td style=\"background-color: #c6d9f0;\">2.86<\/td>\n<td style=\"background-color: #c6d9f0;\">2.63<\/td>\n<td style=\"background-color: #c6d9f0;\">2.37<\/td>\n<td style=\"background-color: #c6d9f0;\">2.72<\/td>\n<td style=\"background-color: #c6d9f0;\">2.84<\/td>\n<td style=\"background-color: #c6d9f0;\">2.51<\/td>\n<td style=\"background-color: #c6d9f0;\">2.65<\/td>\n<td>84-63-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>Bis(2-methoxyethyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>3.08<\/td>\n<td>2.80<\/td>\n<td>2.51<\/td>\n<td>3.13<\/td>\n<td>3.33<\/td>\n<td>2.59<\/td>\n<td style=\"background-color: #dadad9;\">2.90<\/td>\n<td>605-54-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>Di-n-pentylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>3.16<\/td>\n<td>2.91<\/td>\n<td>2.58<\/td>\n<td>3.08<\/td>\n<td>3.21<\/td>\n<td>2.71<\/td>\n<td style=\"background-color: #dadad9;\">2.89<\/td>\n<td>131-18-0<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>11<\/td>\n<td>Di-n-hexylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>3.73<\/td>\n<td>3.46<\/td>\n<td>3.07<\/td>\n<td>3.61<\/td>\n<td>3.69<\/td>\n<td>3.25<\/td>\n<td>3.42<\/td>\n<td>84-75-3<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>Butylbenzylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>3.85<\/td>\n<td>3.56<\/td>\n<td>3.12<\/td>\n<td>3.93<\/td>\n<td style=\"background-color: #dadad9;\">4.13<\/td>\n<td>3.30<\/td>\n<td>3.63<\/td>\n<td>85-68-7<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>13<\/td>\n<td>Hexyl-2-ethylhexylphthalat<\/td>\n<td>EPA 8061A<\/td>\n<td>3.98<\/td>\n<td>3.72<\/td>\n<td>3.29<\/td>\n<td>3.83<\/td>\n<td>3.92<\/td>\n<td>3.52<\/td>\n<td>3.66<\/td>\n<td>75673-16-4<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>14<\/td>\n<td>Bis(2-butoxyethyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>4.12<\/td>\n<td>3.82<\/td>\n<td>3.39<\/td>\n<td>4.08<\/td>\n<td>4.21<\/td>\n<td>3.60<\/td>\n<td>3.85<\/td>\n<td>117-83-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>15<\/td>\n<td>Bis(2-ethylhexyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>4.21<\/td>\n<td>3.95<\/td>\n<td>3.52<\/td>\n<td>4.05<\/td>\n<td style=\"background-color: #dadad9;\">4.12<\/td>\n<td style=\"background-color: #dadad9;\">3.82<\/td>\n<td>3.91<\/td>\n<td>117-81-7<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td>Dicyclohexylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>4.33<\/td>\n<td>4.04<\/td>\n<td>3.55<\/td>\n<td>4.42<\/td>\n<td>4.58<\/td>\n<td style=\"background-color: #dadad9;\">3.78<\/td>\n<td>4.08<\/td>\n<td>84-61-7<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>17<\/td>\n<td>Di-n-octylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>4.76<\/td>\n<td>4.50<\/td>\n<td>3.97<\/td>\n<td>4.59<\/td>\n<td>4.62<\/td>\n<td>4.24<\/td>\n<td>4.39<\/td>\n<td>117-84-0<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>18<\/td>\n<td>Diisononylphthalat<\/td>\n<td>EU<\/td>\n<td>5.10<\/td>\n<td>4.84<\/td>\n<td>4.23<\/td>\n<td>4.84<\/td>\n<td>4.84<\/td>\n<td>4.50<\/td>\n<td>4.64<\/td>\n<td>68515-48-0<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>19<\/td>\n<td>Diisodecylphthalat<\/td>\n<td>EU<\/td>\n<td>5.20<\/td>\n<td>4.95**<\/td>\n<td>4.42<\/td>\n<td>5.01<\/td>\n<td>5.18<\/td>\n<td>4.71<\/td>\n<td>4.90<\/td>\n<td>26761-40-0<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>Dinonylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>5.24<\/td>\n<td>4.95**<\/td>\n<td>4.39<\/td>\n<td>5.04<\/td>\n<td>5.10<\/td>\n<td>4.72<\/td>\n<td>4.83<\/td>\n<td>84-76-4<\/td>\n<td>Rein<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n<p>Hinweis: Die Schattierung zeigt koeluierende Peaks an (Rs&lt;1.5). F\u00fcr die einzelnen S\u00e4ulen zeigen unterschiedliche Schattierungsfarben unterschiedliche Koelutionspaare an..<br>*Diese Verbindungen sind im Phthalatester-Gemisch von Restek f\u00fcr die EPA- Methode 8061A enthalten (Art.-Nr. 33227).<br>**Peaks 19 und 20 sind nicht isobar und k\u00f6nnen durch Selected Ion Monitoring (SIM) getrennt werden.<\/p>\n\n\n\n<p>Auf den Phasen Rxi-35Sil MS und Rtx-50 wurden Unterschiede in der Elutionsreihenfolge beobachtet. Insbesondere \u00e4nderte sich die Elutionsreihenfolge von vier Paaren von Phthalaten auf der Phase Rxi-35Sil MS, darunter die Isomere Bis(2-methoxyethyl)phthalat\/Bis(4-methyl-2-pentyl)phthalat (Peaks 6 und 7\/8), Bis(2-ethoxyethyl)phthalat\/Di-n-pentylphthalat (Peaks 9 und 10), Butylbenzylphthalat\/Hexyl-2-ethylhexylphthalat (Peaks 12 und 13) und Bis(2-butoxyethyl)phthalat\/Bis(2-ethylhexyl)phthalat (Peaks 14 und 15).<\/p>\n\n\n\n<p>Die S\u00e4ulen mit den Phasen Rtx-440 und Rxi-XLB zeigten die insgesamt beste Trennleistung unter diesen Bedingungen. Peaks, die auf anderen Phasen koeluierten, wurden auf Rtx-440- und Rxi-XLB-S\u00e4ulen gut aufgel\u00f6st. Zu den Paaren, die auf anderen Phasen nicht aufgel\u00f6st wurden, geh\u00f6ren Bis(2-ethylhexyl)phthalat und Dicyclohexylphthalat (Peaks 15 und 16) auf der Rxi-5ms-S\u00e4ule, Bis(2-ethylhexyl)phthalat und Butylbenzylphthalat (Peaks 15 und 12) auf der Rtx-50-S\u00e4ule und Bis(2-methoxyethyl) und Bis[4-methyl-2-pentyl]phthalat (Peaks 6 und 7,8) sowie Bis(2-ethoxyethyl)phthalat und Di-n-pentylphthalat (Peaks 9 und 10) auf der Rtx-CLPesticides2-S\u00e4ule. In Isomerengemischen technischer Qualit\u00e4t k\u00f6nnen Isomerengruppen wie Diisononylphthalat und Diisodecylphthalat (Peaks 18 und 19) identifiziert werden, aber es ist nicht m\u00f6glich, jedes einzelne Isomer innerhalb einer Gruppe vollst\u00e4ndig aufzul\u00f6sen. Zum Gl\u00fcck gibt es eindeutige Ionen zur Identifikation und zur quantitativen Bestimmung, z. B. m\/z 293 f\u00fcr Diisononylphthalat und m\/z 307 f\u00fcr Diisododecylphthalat (<a href=\"#figure1\" data-type=\"internal\" data-id=\"#figure1\">Abbildung 1<\/a>).<\/p>\n\n\n\n<p>Ein umfassenderer Vergleich der sieben station\u00e4ren Phasen wurde f\u00fcr die Trennung von 37 Phthalaten (insgesamt 40 Peaks, einschlie\u00dflich dreier Isomere) anhand der von der Pro EZGC-Software vorhergesagten Retentionszeiten durchgef\u00fchrt (Tabelle II). Die in Tabelle III angegebenen GC-Parameter erm\u00f6glichten die Trennung von 34 der 40 Peaks auf sowohl den Rtx-440- als auch den Rxi-XLB-S\u00e4ulen in weniger als 40 Minuten und die beiden Phasen f\u00fchrten zu unterschiedlichen Koelutionen. Das Chromatogramm der Rtx-440-S\u00e4ule wurde erfasst und ist in&nbsp;<a href=\"#figureII\" data-type=\"internal\" data-id=\"#figureII\">Abbildung 2<\/a>&nbsp;dargestellt. F\u00fcr einige Paare, die nicht basisliniengetrennt werden konnten, war die Aufl\u00f6sung dennoch ausreichend f\u00fcr eine qualitative Analyse. Es gibt keinen einzigen Satz von Bedingungen, der f\u00fcr alle Phasen optimal ist. Das Programm mit den insgesamt besten Ergebnissen in puncto Geschwindigkeit und Zahl der aufgel\u00f6sten Peaks wurde f\u00fcr den direkten S\u00e4ulenvergleich ausgew\u00e4hlt. Analytiker k\u00f6nnen die Bedingungen f\u00fcr ihre spezifischen Substanzlisten unter Verwendung des Pro EZGC-Programms optimieren. Aufgrund der Analysegeschwindigkeit insgesamt und der hohen Trennsch\u00e4rfe f\u00fcr die Zielanalyten empfehlen wir die Verwendung der Phasen Rtx-440 und Rxi-XLB zur GC-MS-Analyse von Phthalaten.<\/p>\n\n\n\n<p><strong>Tabelle II:<\/strong>&nbsp;Vorhergesagte Elutionszeiten f\u00fcr Phthalate (erweiterte Liste) auf verschiedenen GC-S\u00e4ulen von Restek<\/p>\n\n\n\n<p>S\u00e4ule: 30 m x 0.25 mm x 0.25 \u03bcm (0.20 \u03bcm f\u00fcr die Rtx-CLPesticides2-S\u00e4ule)<br>Konstante Lineargeschwindigkeit: 48 cm\/sec&nbsp;<br>Ofen: 150 \u00b0C (0.8 min), auf 200 \u00b0C mit 5 \u00b0C\/min, auf 275 \u00b0C mit 3 \u00b0C\/min (2 min)<\/p>\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th rowspan=\"2\"><strong>Peak-Nr.<\/strong><\/th>\n<th rowspan=\"2\"><strong>Bezeichnung<\/strong><\/th>\n<th rowspan=\"2\"><strong>Gelistet in<\/strong><\/th>\n<th colspan=\"7\"><strong>Retentionszeit (min)<\/strong><\/th>\n<th rowspan=\"2\"><strong>CAS Nr.<\/strong><\/th>\n<th rowspan=\"2\"><strong>Reinheit<\/strong><\/th>\n<\/tr>\n<tr>\n<th><strong>Rtx-440<br \/>(Art.-Nr. 12923)<\/strong><\/th>\n<th><strong>Rxi-XLB<br \/>(Art.-Nr. 13723)<\/strong><\/th>\n<th><strong>Rxi-5ms (Art.-Nr. 13423)<\/strong><\/th>\n<th><strong>Rtx-50 (Art.-Nr. 10523)<\/strong><\/th>\n<th><strong>Rxi-35Sil MS (Art.-Nr. 13823)<\/strong><\/th>\n<th><strong>Rtx-<br \/>CLPesticides<br \/>(Art.-Nr. 11123)<\/strong><\/th>\n<th><strong>Rtx-<br \/>CLPesticides2<br \/>(Art.-Nr. 11323)<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Dimethylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority<\/td>\n<td>4.606<\/td>\n<td>3.924<\/td>\n<td>3.294<\/td>\n<td>5.912<\/td>\n<td>4.902<\/td>\n<td>3.75<\/td>\n<td>4.334<\/td>\n<td>131-11-3<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Dimethylisophthalat<\/td>\n<td>\u2014<\/td>\n<td>5.491<\/td>\n<td>4.690<\/td>\n<td>3.85<\/td>\n<td>6.35<\/td>\n<td>5.498<\/td>\n<td>4.174<\/td>\n<td>4.793<\/td>\n<td>1459-93-4<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Diethylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>6.537<\/td>\n<td>5.642<\/td>\n<td>4.762<\/td>\n<td>7.809<\/td>\n<td>6.785<\/td>\n<td>5.24<\/td>\n<td>6.106<\/td>\n<td>84-66-2<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>Benzylbenzoat<\/td>\n<td>Internal Standard<\/td>\n<td>9.931<\/td>\n<td>8.667<\/td>\n<td>N\/A<\/td>\n<td>11.099<\/td>\n<td>N\/A<\/td>\n<td>6.725<\/td>\n<td>8.583<\/td>\n<td>120-51-4<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>Diisobutylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>11.185<\/td>\n<td>10.029<\/td>\n<td>8.817<\/td>\n<td>11.817<\/td>\n<td>11.008<\/td>\n<td>9.101<\/td>\n<td>10.333<\/td>\n<td>84-69-5<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>Di-n-butylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority<\/td>\n<td>13.152<\/td>\n<td>11.850<\/td>\n<td>10.405<\/td>\n<td>14.031<\/td>\n<td>13.094<\/td>\n<td>10.481<\/td>\n<td>12.029<\/td>\n<td>84-74-2<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>Bis(2-methoxyethyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>14.343<\/td>\n<td>12.784<\/td>\n<td>11.045<\/td>\n<td>17.095<\/td>\n<td>15.424<\/td>\n<td>11.54<\/td>\n<td>13.725<\/td>\n<td>117-82-8<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>Bis(4-methyl-2-pentyl)phthalat-Isomer 1*<\/td>\n<td>EPA 8061A<\/td>\n<td>15.192<\/td>\n<td style=\"background-color: #c6d9f0;\">13.754<\/td>\n<td style=\"background-color: #c6d9f0;\">12.47<\/td>\n<td style=\"background-color: #c6d9f0;\">15.184<\/td>\n<td style=\"background-color: #c6d9f0;\">14.454<\/td>\n<td style=\"background-color: #c6d9f0;\">12.166<\/td>\n<td style=\"background-color: #c6d9f0;\">13.825<\/td>\n<td>84-63-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>Bis(4-methyl-2-pentyl)phthalat-Isomer-2*<\/td>\n<td>EPA 8061A<\/td>\n<td>15.350<\/td>\n<td style=\"background-color: #c6d9f0;\">13.828<\/td>\n<td style=\"background-color: #c6d9f0;\">12.55<\/td>\n<td style=\"background-color: #c6d9f0;\">15.277<\/td>\n<td style=\"background-color: #c6d9f0;\">14.542<\/td>\n<td style=\"background-color: #c6d9f0;\">12.233<\/td>\n<td style=\"background-color: #c6d9f0;\">13.906<\/td>\n<td>84-63-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>Bis(2-ethoxyethyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>16.910<\/td>\n<td>15.132<\/td>\n<td>13.199<\/td>\n<td>19.063<\/td>\n<td>17.59<\/td>\n<td>13.186<\/td>\n<td>15.875<\/td>\n<td>605-54-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>11<\/td>\n<td>Di-n-pentylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>17.454<\/td>\n<td>15.880<\/td>\n<td>13.856<\/td>\n<td>17.974<\/td>\n<td>17.128<\/td>\n<td>13.588<\/td>\n<td>15.768<\/td>\n<td>131-18-0<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>Butylcyclohexylphthalat<\/td>\n<td>\u2014<\/td>\n<td>19.452<\/td>\n<td>17.689<\/td>\n<td>15.478<\/td>\n<td>21.19<\/td>\n<td>19.843<\/td>\n<td>14.979<\/td>\n<td style=\"background-color: #dadad9;\">17.96<\/td>\n<td>84-64-0<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>13<\/td>\n<td>Butyl-2-ethylhexylphthalat<\/td>\n<td>\u2014<\/td>\n<td>19.823<\/td>\n<td>18.172<\/td>\n<td>16.174<\/td>\n<td>20.062<\/td>\n<td>19.238<\/td>\n<td>15.566<\/td>\n<td style=\"background-color: #dadad9;\">17.958<\/td>\n<td>85-69-8<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>14<\/td>\n<td>Di-n-hexylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>22.138<\/td>\n<td>20.279<\/td>\n<td style=\"background-color: #dadad9;\">17.984<\/td>\n<td>22.152<\/td>\n<td>21.469<\/td>\n<td>17.215<\/td>\n<td>19.829<\/td>\n<td>84-75-3<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>15<\/td>\n<td>Butyloctylphthalat<\/td>\n<td>\u2014<\/td>\n<td>22.338<\/td>\n<td>20.557<\/td>\n<td>18.136<\/td>\n<td>22.37<\/td>\n<td>21.668<\/td>\n<td style=\"background-color: #dadad9;\">17.344<\/td>\n<td>20.009<\/td>\n<td>84-78-6<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td>Butylbenzylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>22.799<\/td>\n<td>20.783<\/td>\n<td style=\"background-color: #dadad9;\">18.029<\/td>\n<td>25.365<\/td>\n<td style=\"background-color: #dadad9;\">23.782<\/td>\n<td style=\"background-color: #dadad9;\">17.384<\/td>\n<td>21.128<\/td>\n<td>85-68-7<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>17<\/td>\n<td>Hexyl-2-ethylhexylphthalat<\/td>\n<td>EPA 8061A<\/td>\n<td>24.404<\/td>\n<td>22.668<\/td>\n<td>20.266<\/td>\n<td>24.110<\/td>\n<td>23.500<\/td>\n<td style=\"background-color: #d6e3bc;\">19.126<\/td>\n<td style=\"background-color: #d6e3bc;\">22.049<\/td>\n<td>75673-16-4<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>18<\/td>\n<td>Butylisodecylphthalat<\/td>\n<td>\u2014<\/td>\n<td>24.632<\/td>\n<td>22.793<\/td>\n<td>20.392<\/td>\n<td>24.220<\/td>\n<td style=\"background-color: #dadad9;\">23.685<\/td>\n<td>19.424<\/td>\n<td>22.22<\/td>\n<td>42343-36-2<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>19<\/td>\n<td>Bis(2-ethylhexyl)hexahydrophthalat<\/td>\n<td>\u2014<\/td>\n<td>25.066<\/td>\n<td>23.389<\/td>\n<td>21.254<\/td>\n<td>23.089<\/td>\n<td>23.063<\/td>\n<td style=\"background-color: #d6e3bc;\">19.142<\/td>\n<td style=\"background-color: #d6e3bc;\">21.961<\/td>\n<td>84-71-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>Bis(2-n-butoxyethyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>25.601<\/td>\n<td>23.563<\/td>\n<td>20.930<\/td>\n<td>26.746<\/td>\n<td>25.647<\/td>\n<td>19.849<\/td>\n<td>23.533<\/td>\n<td>117-83-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>21<\/td>\n<td>Dicyclohexylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>26.651<\/td>\n<td>24.495<\/td>\n<td>21.771<\/td>\n<td>28.989<\/td>\n<td>27.671<\/td>\n<td>20.530<\/td>\n<td>24.792<\/td>\n<td>84-61-7<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>22<\/td>\n<td>Bis(2-ethylhexyl)phthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td>26.692<\/td>\n<td>24.845<\/td>\n<td style=\"background-color: #d6e3bc;\">22.585<\/td>\n<td>25.903<\/td>\n<td>25.458<\/td>\n<td>21.135<\/td>\n<td>24.048<\/td>\n<td>117-81-7<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>23<\/td>\n<td>Butyl-n-decylphthalat<\/td>\n<td>\u2014<\/td>\n<td>27.362<\/td>\n<td>25.268<\/td>\n<td style=\"background-color: #d6e3bc;\">22.657<\/td>\n<td>26.888<\/td>\n<td>26.410<\/td>\n<td>21.404<\/td>\n<td>24.471<\/td>\n<td>89-19-0<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>24<\/td>\n<td>Diphenylphthalat<\/td>\n<td>\u2014<\/td>\n<td style=\"background-color: #c6d9f0;\">27.987<\/td>\n<td>25.712<\/td>\n<td>22.372<\/td>\n<td>32.277<\/td>\n<td style=\"background-color: #d6e3bc;\">30.170<\/td>\n<td style=\"background-color: #cecbe6;\">21.614<\/td>\n<td>26.473<\/td>\n<td>84-62-8<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>25<\/td>\n<td>Bis(4-methylcyclohexyl)phthalat-Isomer 1<\/td>\n<td>\u2014<\/td>\n<td style=\"background-color: #c6d9f0;\">28.003<\/td>\n<td>25.922<\/td>\n<td>23.016<\/td>\n<td>29.547<\/td>\n<td>28.476<\/td>\n<td style=\"background-color: #cecbe6;\">21.677<\/td>\n<td>25.923<\/td>\n<td>59-43-8<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>26<\/td>\n<td>Bis(4-methylcyclohexyl)phthalat-Isomer 2<\/td>\n<td>\u2014<\/td>\n<td>29.002<\/td>\n<td>26.993<\/td>\n<td>23.816<\/td>\n<td>30.345<\/td>\n<td>29.400<\/td>\n<td>22.604<\/td>\n<td style=\"background-color: #cecbe6;\">26.739<\/td>\n<td>59-43-8<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>27<\/td>\n<td>Hexylisodecylphthalat<\/td>\n<td>\u2014<\/td>\n<td>29.176<\/td>\n<td>27.271<\/td>\n<td style=\"background-color: #cecbe6;\">24.523<\/td>\n<td style=\"background-color: #dadad9;\">28.189<\/td>\n<td>27.965<\/td>\n<td style=\"background-color: #f0f4cd;\">23.224<\/td>\n<td>26.336<\/td>\n<td>61702-81-6<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>28<\/td>\n<td>Benzyl-2-ethylhexylphthalat<\/td>\n<td>\u2014<\/td>\n<td>29.791<\/td>\n<td>27.781<\/td>\n<td>24.747<\/td>\n<td>31.498<\/td>\n<td style=\"background-color: #d6e3bc;\">30.216<\/td>\n<td style=\"background-color: #f0f4cd;\">23.219<\/td>\n<td style=\"background-color: #f0f4cd;\">27.594<\/td>\n<td>27215-22-1<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>29<\/td>\n<td>Bis(4-methylcyclohexyl)phthalat-Isomer-3<\/td>\n<td>\u2014<\/td>\n<td>29.964<\/td>\n<td style=\"background-color: #dadad9;\">28.034<\/td>\n<td style=\"background-color: #cecbe6;\">24.617<\/td>\n<td>31.189<\/td>\n<td style=\"background-color: #cecbe6;\">30.285<\/td>\n<td>23.498<\/td>\n<td style=\"background-color: #f0f4cd;\">27.559<\/td>\n<td>59-43-8<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>30<\/td>\n<td>Bis(2-ethylhexyl)isophthalat<\/td>\n<td>\u2014<\/td>\n<td style=\"background-color: #dadad9;\">30.132<\/td>\n<td style=\"background-color: #dadad9;\">28.037<\/td>\n<td>25.684<\/td>\n<td style=\"background-color: #dadad9;\">28.133<\/td>\n<td>28.243<\/td>\n<td style=\"background-color: #eddcca;\">23.907<\/td>\n<td style=\"background-color: #cecbe6;\">26.648<\/td>\n<td>137-89-3<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>31<\/td>\n<td>Bis(2-(ethoxyethoxy)ethyl)phthalat<\/td>\n<td>\u2014<\/td>\n<td style=\"background-color: #dadad9;\">30.233<\/td>\n<td>28.434<\/td>\n<td>24.879<\/td>\n<td>32.942<\/td>\n<td>31.252<\/td>\n<td style=\"background-color: #eddcca;\">23.995<\/td>\n<td>28.681<\/td>\n<td>117-85-1<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>32<\/td>\n<td>Di-n-octylphthalat*<\/td>\n<td>EPA 8061A, EPA Priority, EU<\/td>\n<td>31.562<\/td>\n<td>29.626<\/td>\n<td style=\"background-color: #f0f4cd;\">26.796<\/td>\n<td>30.475<\/td>\n<td style=\"background-color: #cecbe6;\">30.328<\/td>\n<td style=\"background-color: #aeaba8;\">24.915<\/td>\n<td>28.455<\/td>\n<td>117-84-0<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>33<\/td>\n<td>n-Hexyldecylphthalat<\/td>\n<td>\u2014<\/td>\n<td>31.680<\/td>\n<td>29.748<\/td>\n<td style=\"background-color: #f0f4cd;\">26.878<\/td>\n<td>30.788<\/td>\n<td>30.450<\/td>\n<td style=\"background-color: #aeaba8;\">24.994<\/td>\n<td>28.566<\/td>\n<td>25724-58-7<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<tr>\n<td>34<\/td>\n<td>Diphenylisophthalat<\/td>\n<td>\u2014<\/td>\n<td>32.362<\/td>\n<td>29.850<\/td>\n<td>N\/A<\/td>\n<td style=\"background-color: #d6e3bc;\">34.707<\/td>\n<td>32.396<\/td>\n<td>25.114<\/td>\n<td>29.437<\/td>\n<td>744-45-6<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>35<\/td>\n<td>Dibenzylphthalat<\/td>\n<td>\u2014<\/td>\n<td>33.234<\/td>\n<td>30.725<\/td>\n<td>27.141<\/td>\n<td>37.396<\/td>\n<td>35.372<\/td>\n<td>25.501<\/td>\n<td>31.359<\/td>\n<td>523-31-9<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>36<\/td>\n<td>Diisononylphthalat<\/td>\n<td>EU<\/td>\n<td>33.684<\/td>\n<td>31.802<\/td>\n<td>28.779<\/td>\n<td>32.500<\/td>\n<td>32.708<\/td>\n<td>27.391<\/td>\n<td>30.811<\/td>\n<td>68515-48-0<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>37<\/td>\n<td>Di-n-octylisophthalat<\/td>\n<td>\u2014<\/td>\n<td>34.483<\/td>\n<td>32.463<\/td>\n<td>29.168<\/td>\n<td>32.035<\/td>\n<td>N\/A<\/td>\n<td>27.223<\/td>\n<td>30.388<\/td>\n<td>4654-18-6<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>38<\/td>\n<td>Diisodecylphthalat<\/td>\n<td>EU<\/td>\n<td>35.775<\/td>\n<td>33.792<\/td>\n<td style=\"background-color: #eddcca;\">30.876<\/td>\n<td>35.041<\/td>\n<td>N\/A<\/td>\n<td>29.11<\/td>\n<td>32.169<\/td>\n<td>26761-40-0<\/td>\n<td>Isomerengemisch<\/td>\n<\/tr>\n<tr>\n<td>39<\/td>\n<td>Dinonylphthalat*<\/td>\n<td>EPA 8061A<\/td>\n<td style=\"background-color: #d6e3bc;\">36.159<\/td>\n<td style=\"background-color: #d6e3bc;\">34.103<\/td>\n<td style=\"background-color: #eddcca;\">30.994<\/td>\n<td style=\"background-color: #d6e3bc;\">34.609<\/td>\n<td style=\"background-color: #f0f4cd;\">34.705<\/td>\n<td style=\"background-color: #c4bc96;\">28.867<\/td>\n<td style=\"background-color: #eddcca;\">32.604<\/td>\n<td>84-76-4<\/td>\n<td>Rein<\/td>\n<\/tr>\n<tr>\n<td>40<\/td>\n<td>n-Octyl-n-decylphthalat<\/td>\n<td>\u2014<\/td>\n<td style=\"background-color: #d6e3bc;\">36.182<\/td>\n<td style=\"background-color: #d6e3bc;\">34.170<\/td>\n<td style=\"background-color: #eddcca;\">30.961<\/td>\n<td style=\"background-color: #d6e3bc;\">34.664<\/td>\n<td style=\"background-color: #f0f4cd;\">34.7<\/td>\n<td style=\"background-color: #c4bc96;\">28.861<\/td>\n<td style=\"background-color: #eddcca;\">32.628<\/td>\n<td>119-07-3<\/td>\n<td>Technische Qualit\u00e4t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n<p>Hinweis: Die Schattierung zeigt koeluierende Peaks an (Rs&lt;1.5). F\u00fcr die einzelnen S\u00e4ulen zeigen unterschiedliche Schattierungsfarben unterschiedliche Koelutionspaare an.<br>*Diese Verbindungen sind im Phthalatester-Gemisch von Restek f\u00fcr die EPA- Methode 8061A enthalten (<a href=\"https:\/\/www.restek.com\/global\/de\/p\/33227\" target=\"_blank\" rel=\"noopener\">Art.-Nr. 33227<\/a>).<\/p>\n\n\n\n<p id=\"table-III\"><strong>Tabelle III:<\/strong>&nbsp;GC-MS Parameter<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><strong>Parameter<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Werte f\u00fcr EPA &amp; EU-Listen<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Werte f\u00fcr erweiterte Liste<\/strong><\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Injektortemperatur (\u00b0C)<\/td><td class=\"has-text-align-center\" data-align=\"center\">280<\/td><td class=\"has-text-align-center\" data-align=\"center\">280<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Injektionsvolumen (\u00b5L)<\/td><td class=\"has-text-align-center\" data-align=\"center\">1.0<\/td><td class=\"has-text-align-center\" data-align=\"center\">1.0<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Liner<\/td><td class=\"has-text-align-center\" data-align=\"center\">Restek Premium 3.5mm Precision Liner mit Glaswolle (Art.-Nr. 23320.1)<\/td><td class=\"has-text-align-center\" data-align=\"center\">Restek Premium 3.5mm Precision Liner mit Glaswolle (Art.-Nr. 23320.1)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ofen Temperaturprogramm<\/td><td class=\"has-text-align-center\" data-align=\"center\">200 \u00b0C (0.5 min) auf 330 \u00b0C* mit 30 \u00b0C\/min<br>(1 min)<\/td><td class=\"has-text-align-center\" data-align=\"center\">150 \u00b0C (0.8 min), auf 200 \u00b0C mit 5 \u00b0C\/min, auf 275 \u00b0C mit 3 \u00b0C\/min (2 min)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Tr\u00e4gergas: He<\/td><td class=\"has-text-align-center\" data-align=\"center\">Konstante Lineargeschwindigkeit: 66.7 cm\/sec bei 200 \u00b0C<br>(3 mL\/min**)<\/td><td class=\"has-text-align-center\" data-align=\"center\">Konstante Lineargeschwindigkeit: 48 cm\/sec bei 150 \u00b0C (1.6 mL\/min)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Split-Verh\u00e4ltnis<\/td><td class=\"has-text-align-center\" data-align=\"center\">20:1<\/td><td class=\"has-text-align-center\" data-align=\"center\">20:1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Detektor<\/td><td class=\"has-text-align-center\" data-align=\"center\">MS<\/td><td class=\"has-text-align-center\" data-align=\"center\">MS<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Modus:<\/td><td class=\"has-text-align-center\" data-align=\"center\">Vollscan (59\u2013400)<\/td><td class=\"has-text-align-center\" data-align=\"center\">Vollscan (59\u2013400)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Temp. Transferline:<\/td><td class=\"has-text-align-center\" data-align=\"center\">300 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">300 \u00b0C<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Scanereigniszeit<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1 sec<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1 sec<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Analysatortyp:<\/td><td class=\"has-text-align-center\" data-align=\"center\">Quadrupol<\/td><td class=\"has-text-align-center\" data-align=\"center\">Quadrupol<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ionenquellentemperatur:<\/td><td class=\"has-text-align-center\" data-align=\"center\">280 \u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">280 \u00b0C<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">L\u00f6semittelausblendung:<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.9 min<\/td><td class=\"has-text-align-center\" data-align=\"center\">2.5 min<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Tuning-Typ:&nbsp;<\/td><td class=\"has-text-align-center\" data-align=\"center\">PFTBA<\/td><td class=\"has-text-align-center\" data-align=\"center\">PFTBA<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ionisierungsmodus:<\/td><td class=\"has-text-align-center\" data-align=\"center\">EI<\/td><td class=\"has-text-align-center\" data-align=\"center\">EI<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>*320 \u00b0C f\u00fcr Rtx-50<br>**3 mL\/min ist f\u00fcr manche Ger\u00e4te m\u00f6glicherweise zu hoch. Konsultieren Sie das Betriebshandbuch Ihres Ger\u00e4ts vor der Programmierung.<\/p>\n\n\n\n<p>Obwohl GC-MS im allgemeinen die bevorzugte Methode ist, da sie eindeutigere Informationen liefert, lassen sich Phthalate auch mithilfe von GC-ECD erfolgreich analysieren. EPA 8061A ist eine Methode, die zur Identifikation und zur quantitativen Bestimmung von Phthalaten in w\u00e4ssrigen und festen Matrices mithilfe einer parallelen S\u00e4ulenkonfiguration und zwei Elektroneneinfangdetektoren (ECDs) verwendet wird [8]. Rtx-440 und Rxi-35Sil MS-S\u00e4ulen sind ideal f\u00fcr eine Konfiguration mit zwei parallelen S\u00e4ulen. Mithilfe der Pro EZGC-Software lie\u00dfen sich geeignete Analysebedingungen f\u00fcr die Rtx-440-S\u00e4ule schnell bestimmen, und die Rxi-35Sil MS-S\u00e4ule diente dann aufgrund der beobachteten \u00c4nderungen in der Elutionsreihenfolge als ausgezeichnete Best\u00e4tigungss\u00e4ule. Die GC-ECD-Bedingungen lassen sich unter Verwendung des kostenlosen online EZGC-Method Translators von Restek leicht aus den in Tabelle III gezeigten GC-MS-Methoden ableiten.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Schlussfolgerung<\/h2>\n\n\n\n<p>Die sieben am h\u00e4ufigsten verwendeten GC-S\u00e4ulen f\u00fcr die Analyse von Phthalaten wurden mithilfe der Pro EZCG-Software, eines Tools zur flexiblen und einfachen GC-Optimierung, direkt verglichen. Die \u00fcberlegene Selektivit\u00e4t und Trennleistung der S\u00e4ulen Rtx-440 und Rxi-XLB ergab schnelle Analysezeiten f\u00fcr sowohl die regulierten als auch die Phthalate der erweiterten Liste. Mit guter Aufl\u00f6sung, hohen maximalen Betriebstemperaturen (340 \u00b0C f\u00fcr Rtx-440 und 360 \u00b0C f\u00fcr Rxi-XLB [Tabelle IV]) sowie minimalem S\u00e4ulenbluten sind die S\u00e4ulen Rtx-440 und Rxi-XLB die bevorzugte Wahl f\u00fcr die Analyse von Phthalaten mithilfe der GC-MS. Bei Verwendung eines GC-ECD Systems anstelle der GC-MS wird eine Konfiguration mit den beiden S\u00e4ulen Rtx-440 und Rxi-35Sil MS empfohlen.<\/p>\n\n\n\n<p><strong>Tabelle IV:<\/strong>&nbsp;Maximaltemperaturen<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>&nbsp;<\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rtx-440<br>(Art.-Nr. 12923)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rxi-XLB<br>(Art.-Nr. 13723)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rxi-5ms<br>(Art.-Nr. 13423)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rtx-50<br>(Art.-Nr. 10523)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rxi-35Sil MS<br>(Art.-Nr. 13823)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rtx-CLPesticides<br>(Art.-Nr. 11123)<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\"><strong>Rtx-CLPesticides2<br>(Art.-Nr. 11323)<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Maximaltemperatur (\u00b0C)<\/td><td class=\"has-text-align-center\" data-align=\"center\">340<\/td><td class=\"has-text-align-center\" data-align=\"center\">360<\/td><td class=\"has-text-align-center\" data-align=\"center\">350<\/td><td class=\"has-text-align-center\" data-align=\"center\">320<\/td><td class=\"has-text-align-center\" data-align=\"center\">360<\/td><td class=\"has-text-align-center\" data-align=\"center\">340<\/td><td class=\"has-text-align-center\" data-align=\"center\">340<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Danksagungen<\/h2>\n\n\n\n<p>Die Autoren bedanken sich bei der Shimadzu Corporation f\u00fcr ihre Unterst\u00fctzung.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Literatur<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>H. Choi, J. Kim, Y. Im, S. Lee, Y. Kim, The association between some endocrine disruptors and hypospadias in biological samples. J. Environ. Sci. Health, Part A: Toxic\/Hazard. Subst. Environ. Eng. 47 (13) (2012) 2173\u20132179.&nbsp;<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/22871016\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/22871016<\/a><\/li>\n\n\n\n<li>N. Nassar, P. Abeywardana, A. Barker, C. Bower, Parental occupational exposure to potential endocrine disrupting chemicals and risk of hypospadias in infants. Occup. Environ. Med. 67 (9) (2010) 585\u2013589.&nbsp;<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/19939854\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/19939854<\/a><\/li>\n\n\n\n<li>L. Trasande, S. Sathyanarayana, A.J. Spanier, H. Trachtman, T.M. Attina, E.M. Urbina, Urinary phthalates are associated with higher blood pressure in childhood. J. Pediatr. 163 (3) (2013) 747\u2013753e1.&nbsp;<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4074773\/\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC4074773\/<\/a><\/li>\n\n\n\n<li>E.F. Werner, J.M. Braun, K. Yolton, J.C. Khoury, B.P. Lanphear, The association between maternal urinary phthalate concentrations and blood pressure in pregnancy: The HOME Study. Environ. Health 14 (2015) 75.&nbsp;<a href=\"http:\/\/www.ehjournal.net\/content\/14\/1\/75\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ehjournal.net\/content\/14\/1\/75<\/a><\/li>\n\n\n\n<li>J.J. Jaakkola, T.L. Knight, The role of exposure to phthalates from polyvinyl chloride products in the development of asthma and allergies: A systematic review and meta-analysis. Environ. Health Perspect. 116 (7) (2008) 845\u2013853.&nbsp;<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2453150\/\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2453150\/<\/a><\/li>\n\n\n\n<li>E.E. Hatch, J.W. Nelson, R.W. Stahlhut, T.F. Webster, Association of endocrine disruptors and obesity: Perspectives from epidemiological studies. Int. J. Androl. 33 (2) (2010) 324\u2013332.&nbsp;<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/20113374\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/20113374<\/a><\/li>\n\n\n\n<li>S. Net, A. Delmont, R. Sempere, A. Paluselli, B. Ouddane, Reliable quantification of phthalates in environmental matrices (air, water, sludge, sediment and soil): A review. Sci. Total Environ. 515-516 (2015) 162\u2013180.&nbsp;<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/25723871\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/25723871<\/a><\/li>\n\n\n\n<li>U.S. Environmental Protection Agency, Method 8061A, Phthalate Esters by Gas Chromatography with Electron Capture Detection (GC\/ECD), Rev. 1, December 1996.&nbsp;<a href=\"https:\/\/www.epa.gov\/sites\/production\/files\/2015-12\/documents\/8061a.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.epa.gov\/sites\/production\/files\/2015-12\/documents\/8061a.pdf<\/a><\/li>\n<\/ol>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" id=\"figure1\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 1:<\/strong>\u00a0EPA- and EU-listed phthalates and internal standard (benzyl benzoate) are shown under full scan mode and selected ion scan mode (m\/z 293 and m\/z 307) on seven different GC stationary phases (see <a href=\"#table-III\" data-type=\"internal\" data-id=\"#table-III\">Table III<\/a> for conditions).<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1408.png\" alt=\"EPA and EU Phthalates on Rtx-440\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1408<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-6 col-12 peak-50\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dimethyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/131-11-3\/Dimethyl phthalate\" target=\"_blank\" rel=\"noopener\">Dimethyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diethyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-66-2\/Diethyl phthalate\" target=\"_blank\" rel=\"noopener\">Diethyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Benzyl benzoate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/120-51-4\/Benzyl benzoate\" target=\"_blank\" rel=\"noopener\">Benzyl benzoate<\/a><\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisobutyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-69-5\/Diisobutyl phthalate\" target=\"_blank\" rel=\"noopener\">Diisobutyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-butyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-74-2\/Di-n-butyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-butyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-methoxyethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-82-8\/Bis(2-methoxyethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-methoxyethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\">Bis[4-methyl-2-pentyl] phthalate isomer 1<\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis[4-methyl-2-pentyl] phthalate isomer 2\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-63-9\/Bis[4-methyl-2-pentyl] phthalate isomer 2\" target=\"_blank\" rel=\"noopener\">Bis[4-methyl-2-pentyl] phthalate isomer 2<\/a><\/td><\/tr>\n<tr><td class=\"num\">9.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-ethoxyethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/605-54-9\/Bis(2-ethoxyethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-ethoxyethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">10.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-pentyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/131-18-0\/Di-n-pentyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-pentyl phthalate<\/a><\/td><\/tr>\n<\/tbody><\/table>\n<table class=\"peaks col-lg-6 col-12 peak-50\"><thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">11.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-hexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-75-3\/Di-n-hexyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-hexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">12.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl benzyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/85-68-7\/Butyl benzyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl benzyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">13.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Hexyl-2-ethylhexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75673-16-4\/Hexyl-2-ethylhexyl phthalate\" target=\"_blank\" rel=\"noopener\">Hexyl-2-ethylhexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">14.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-butoxyethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-83-9\/Bis(2-butoxyethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-butoxyethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">15.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-ethylhexyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-81-7\/Bis(2-ethylhexyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-ethylhexyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">16.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dicyclohexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-61-7\/Dicyclohexyl phthalate\" target=\"_blank\" rel=\"noopener\">Dicyclohexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">17.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-octyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-84-0\/Di-n-octyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-octyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">18.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisononyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/28553-12-0\/Diisononyl phthalate\" target=\"_blank\" rel=\"noopener\">Diisononyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">19.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisodecyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/26761-40-0\/Diisodecyl phthalate\" target=\"_blank\" rel=\"noopener\">Diisodecyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">20.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dinonyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-76-4\/Dinonyl phthalate\" target=\"_blank\" rel=\"noopener\">Dinonyl phthalate<\/a><\/td><\/tr>\n<\/tbody><\/table><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1408.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n\n\n<p><strong>Rxi-XLB<\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1409.png\" alt=\"EPA and EU Phthalates on Rxi-XLB\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1409<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1409.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n\n\n<p><strong>Rtx-CLPesticides<\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1414.png\" alt=\"EPA and EU Phthalates on Rtx-CLPesticides\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1414<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1414.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n\n\n<p><strong>Rxi-35Sil MS<\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1413.png\" alt=\"EPA and EU Phthalates on Rxi-35Sil MS\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1413<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1413.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n\n\n<p><strong>Rtx-50<\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1415.png\" alt=\"EPA and EU Phthalates on Rtx-50\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1415<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1415.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n\n\n<p><strong>Rxi-5ms<\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1412.png\" alt=\"EPA and EU Phthalates on Rxi-5ms\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1412<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1412.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n\n\n<p><strong>Rtx-CLPesticides2<\/strong><\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1416.png\" alt=\"EPA and EU Phthalates on Rtx-CLPesticides2\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1416<\/p><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1416.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" id=\"figureII\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\"><strong>Figure 2:<\/strong>\u00a0Target compounds on the extended phthalate list (50 \u00b5g\/mL) are separated under full scan mode on an Rtx-440 column (see <a href=\"#table-III\" data-type=\"internal\" data-id=\"#table-III\">Table III <\/a>for conditions).<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-custom-chromatogram-article\"><div class=\"wp-block-custom-chromatogram-article\"><div class=\"chromatogram-image wide-image\"><img decoding=\"async\" src=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1407.png\" alt=\"Phthalates (50 \u00b5g\/mL) on Rtx-440 (Extended List, Full Scan Mode)\" title=\"-\"><\/div><p class=\"article-id\" style=\"text-align:center\"> GC_EV1407<\/p><div class=\"chromatogram-peaks\"><h4>Peaks<\/h4><table class=\"peaks col-lg-4 col-12 peak-33\">\n<thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><\/tr><\/thead>\n<tbody><tr><td class=\"num\">1.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dimethyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/131-11-3\/Dimethyl phthalate\" target=\"_blank\" rel=\"noopener\">Dimethyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">2.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dimethyl isophthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/1459-93-4\/Dimethyl isophthalate\" target=\"_blank\" rel=\"noopener\">Dimethyl isophthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">3.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diethyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-66-2\/Diethyl phthalate\" target=\"_blank\" rel=\"noopener\">Diethyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">4.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Benzyl benzoate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/120-51-4\/Benzyl benzoate\" target=\"_blank\" rel=\"noopener\">Benzyl benzoate<\/a><\/td><\/tr>\n<tr><td class=\"num\">5.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisobutyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-69-5\/Diisobutyl phthalate\" target=\"_blank\" rel=\"noopener\">Diisobutyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">6.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-butyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-74-2\/Di-n-butyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-butyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">7.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-methoxyethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-82-8\/Bis(2-methoxyethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-methoxyethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">8.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis[4-methyl-2-pentyl] phthalate isomer 1\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-63-9\/Bis[4-methyl-2-pentyl] phthalate isomer 1\" target=\"_blank\" rel=\"noopener\">Bis[4-methyl-2-pentyl] phthalate isomer 1<\/a><\/td><\/tr>\n<tr><td class=\"num\">9.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis[4-methyl-2-pentyl] phthalate isomer 2\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-63-9\/Bis[4-methyl-2-pentyl] phthalate isomer 2\" target=\"_blank\" rel=\"noopener\">Bis[4-methyl-2-pentyl] phthalate isomer 2<\/a><\/td><\/tr>\n<tr><td class=\"num\">10.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-ethoxyethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/605-54-9\/Bis(2-ethoxyethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-ethoxyethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">11.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-pentyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/131-18-0\/Di-n-pentyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-pentyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">12.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl cyclohexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-64-0\/Butyl cyclohexyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl cyclohexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">13.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl 2-ethylhexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/85-69-8\/Butyl 2-ethylhexyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl 2-ethylhexyl phthalate<\/a><\/td><\/tr>\n<\/tbody><\/table>\n<table class=\"peaks col-lg-4 col-12 peak-33\"><thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">14.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-hexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-75-3\/Di-n-hexyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-hexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">15.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl octyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-78-6\/Butyl octyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl octyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">16.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl benzyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/85-68-7\/Butyl benzyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl benzyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">17.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Hexyl-2-ethylhexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/75673-16-4\/Hexyl-2-ethylhexyl phthalate\" target=\"_blank\" rel=\"noopener\">Hexyl-2-ethylhexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">18.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl isodecyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/42343-36-2\/Butyl isodecyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl isodecyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">19.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-ethylhexyl)hexahydro phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-71-9\/Bis(2-ethylhexyl)hexahydro phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-ethylhexyl)hexahydro phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">20.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-n-butoxyethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-83-9\/Bis(2-n-butoxyethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-n-butoxyethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">21.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dicyclohexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-61-7\/Dicyclohexyl phthalate\" target=\"_blank\" rel=\"noopener\">Dicyclohexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">22.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-ethylhexyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-81-7\/Bis(2-ethylhexyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-ethylhexyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">23.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Butyl-n-decyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/89-19-0\/Butyl-n-decyl phthalate\" target=\"_blank\" rel=\"noopener\">Butyl-n-decyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">24.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diphenyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-62-8\/Diphenyl phthalate\" target=\"_blank\" rel=\"noopener\">Diphenyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">25.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(4-methylcyclohexyl) phthalate isomer 1\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/18249-11-1\/Bis(4-methylcyclohexyl) phthalate isomer 1\" target=\"_blank\" rel=\"noopener\">Bis(4-methylcyclohexyl) phthalate isomer 1<\/a><\/td><\/tr>\n<tr><td class=\"num\">26.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(4-methylcyclohexyl) phthalate isomer 2\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/18249-11-1\/Bis(4-methylcyclohexyl) phthalate isomer 2\" target=\"_blank\" rel=\"noopener\">Bis(4-methylcyclohexyl) phthalate isomer 2<\/a><\/td><\/tr>\n<\/tbody><\/table>\n<table class=\"peaks col-lg-4 col-12 peak-33\"><thead><tr><th><\/th><th style=\"text-align: left;width: 75px\">Peaks<\/th><\/tr><\/thead><tbody>\n<tr><td class=\"num\">27.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Hexyl isodecyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/61702-81-6\/Hexyl isodecyl phthalate\" target=\"_blank\" rel=\"noopener\">Hexyl isodecyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">28.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Benzyl 2-ethylhexyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/27215-22-1\/Benzyl 2-ethylhexyl phthalate\" target=\"_blank\" rel=\"noopener\">Benzyl 2-ethylhexyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">29.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(4-methylcyclohexyl) phthalate isomer 3\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/18249-11-1\/Bis(4-methylcyclohexyl) phthalate isomer 3\" target=\"_blank\" rel=\"noopener\">Bis(4-methylcyclohexyl) phthalate isomer 3<\/a><\/td><\/tr>\n<tr><td class=\"num\">30.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-ethylhexyl) isophthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/137-89-3\/Bis(2-ethylhexyl) isophthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-ethylhexyl) isophthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">31.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Bis(2-(ethoxyethoxy)ethyl) phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-85-1\/Bis(2-(ethoxyethoxy)ethyl) phthalate\" target=\"_blank\" rel=\"noopener\">Bis(2-(ethoxyethoxy)ethyl) phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">32.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-octyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/117-84-0\/Di-n-octyl phthalate\" target=\"_blank\" rel=\"noopener\">Di-n-octyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">33.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for n-Hexyl decyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/25724-58-7\/n-Hexyl decyl phthalate\" target=\"_blank\" rel=\"noopener\">n-Hexyl decyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">34.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diphenyl isophthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/744-45-6\/Diphenyl isophthalate\" target=\"_blank\" rel=\"noopener\">Diphenyl isophthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">35.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dibenzyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/523-31-9\/Dibenzyl phthalate\" target=\"_blank\" rel=\"noopener\">Dibenzyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">36.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisononyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/28553-12-0\/Diisononyl phthalate\" target=\"_blank\" rel=\"noopener\">Diisononyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">37.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Di-n-octyl isophthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/4654-18-6\/Di-n-octyl isophthalate\" target=\"_blank\" rel=\"noopener\">Di-n-octyl isophthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">38.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Diisodecyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/26761-40-0\/Diisodecyl phthalate\" target=\"_blank\" rel=\"noopener\">Diisodecyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">39.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for Dinonyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/84-76-4\/Dinonyl phthalate\" target=\"_blank\" rel=\"noopener\">Dinonyl phthalate<\/a><\/td><\/tr>\n<tr><td class=\"num\">40.<\/td><td class=\"cmpd\"><a class=\"cmpd_link\" title=\"View compound information for n-Octyl n-decyl phthalate\" href=\"https:\/\/ez.restek.com\/compound\/view\/en\/119-07-3\/n-Octyl n-decyl phthalate\" target=\"_blank\" rel=\"noopener\">n-Octyl n-decyl phthalate<\/a><\/td><\/tr>\n<\/tbody><\/table><\/div><div class=\"chromatogram-pdf-link\"><a href=\"https:\/\/ez.restek.com\/images\/cgram\/gc_ev1407.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewBox=\"0 0 18 18\"><g data-name=\"Group 2996\"><path data-name=\"Rectangle 1246\" d=\"M0 0h18v18H0z\" style=\"fill: none;\"><\/path><\/g><g data-name=\"Group 2997\"><path data-name=\"Path 729\" d=\"M13.412 11.4v2.017H5.345V11.4H4v2.017a1.349 1.349 0 0 0 1.345 1.345h8.068a1.349 1.349 0 0 0 1.345-1.345V11.4zm-.672-2.694-.948-.948-1.741 1.735V4H8.706v5.493L6.965 7.758l-.948.948 3.361 3.361z\" transform=\"translate(-.437 -.414)\" style=\"fill: rgb(13, 123, 196);\"><\/path><\/g><\/svg>Download PDF<\/a><\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n        <div class=\"cpb\">\n            <h3 class=\"cpb-heading\">Products Mentioned<\/h3>\n            <hr class=\"cpb-heading-underline\" \/>\n            <div class=\"cpb-list\">\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/33227\">                                Catalog No. 33227                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">EPA-Methode 8061A Phthalatester-Gemisch, 1000 \u03bcg\/mL in Hexan:Aceton (80:20), 1 mL\/Ampulle<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/33227\">Produkt anzeigen<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/31847\">                                Catalog No. 31847                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Benzylbenzoat (Interner Standard), 5000 \u03bcg\/mL, Hexan, 1 mL\/Ampulle<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/31847\">Produkt anzeigen<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/12923\">                                Catalog No. 12923                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Rtx-440 GC Kapillars\u00e4ule, 30 m, 0.25 mm ID, 0.25 \u00b5m<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/12923\">Produkt anzeigen<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>In diesem Anwendungshinweis werden die sieben am h\u00e4ufigsten f\u00fcr die Phthalatanalyse verwendeten S\u00e4ulen direkt miteinander verglichen. Rtx-440- und Rxi-XLB-S\u00e4ulen sind die bevorzugte Wahl f\u00fcr die GC-MS-Analyse von Phthalaten, da sie schnelle Analysezeiten und eine gute Aufl\u00f6sung sowohl f\u00fcr 18 regulierte Phthalate als auch f\u00fcr eine erweiterte Liste von 40 Verbindungen bieten. F\u00fcr GC-ECD-Arbeiten wird ein Doppels\u00e4ulensatz aus Rtx-440- und Rxi-35Sil-MS-S\u00e4ulen empfohlen.<\/p>\n","protected":false},"author":21,"featured_media":7081,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[783],"tags":[],"industries-application":[2236,2230],"post-badge":[],"resource-type":[],"product-library":[2480,2492],"resource-technique":[2324,2328],"ppma_author":[587,513,441],"class_list":["post-45298","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anwendungshinweise","industries-application-lebensmittel-getranke","industries-application-umweltbereich","product-library-gaschromatographie-produkte","product-library-gc-saulen","resource-technique-gaschromatographie-gc","resource-technique-massenspektrometrie-ms"],"acf":[],"taxonomy_info":{"category":[{"value":783,"label":"Anwendungshinweise"}],"industries-application":[{"value":2236,"label":"Lebensmittel &amp; Getr\u00e4nke"},{"value":2230,"label":"Umweltbereich"}],"product-library":[{"value":2480,"label":"Gaschromatographie Produkte"},{"value":2492,"label":"GC S\u00e4ulen"}],"resource-technique":[{"value":2324,"label":"Gaschromatographie (GC)"},{"value":2328,"label":"Massenspektrometrie (MS)"}]},"featured_image_src_large":["https:\/\/discover.restek.com\/wp-content\/uploads\/feature-GNAN2380-1024x536.jpg",1024,536,true],"author_info":{"display_name":"Chris English","author_link":"https:\/\/discover.restek.com\/de\/author\/chris-english\/"},"comment_info":0,"category_info":[{"term_id":783,"name":"Anwendungshinweise","slug":"anwendungshinweise","term_group":0,"term_taxonomy_id":783,"taxonomy":"category","description":"","parent":0,"count":88,"filter":"raw","cat_ID":783,"category_count":88,"category_description":"","cat_name":"Anwendungshinweise","category_nicename":"anwendungshinweise","category_parent":0}],"tag_info":false,"authors":[{"term_id":587,"user_id":0,"is_guest":1,"slug":"dan-li","display_name":"Dan Li","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":513,"user_id":0,"is_guest":1,"slug":"becca-stevens","display_name":"Rebecca Stevens","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":441,"user_id":21,"is_guest":0,"slug":"chris-english","display_name":"Chris English","avatar_url":{"url":"https:\/\/discover.restek.com\/wp-content\/uploads\/people-english-chris.png","url2x":"https:\/\/discover.restek.com\/wp-content\/uploads\/people-english-chris.png"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/45298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/comments?post=45298"}],"version-history":[{"count":18,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/45298\/revisions"}],"predecessor-version":[{"id":74886,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/45298\/revisions\/74886"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/media\/7081"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/media?parent=45298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/categories?post=45298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/tags?post=45298"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/industries-application?post=45298"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/post-badge?post=45298"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-type?post=45298"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/product-library?post=45298"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-technique?post=45298"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/ppma_author?post=45298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}