{"id":48545,"date":"2022-05-02T14:30:00","date_gmt":"2022-05-02T14:30:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/pfas-dans-lair-partie-4-purification-sur-resine-otm-45\/"},"modified":"2026-04-28T19:43:45","modified_gmt":"2026-04-28T19:43:45","slug":"pfas-dans-lair-partie-4-purification-sur-resine-otm-45","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/fr\/communiques-de-presse-actualites\/gnbl4770-fr\/pfas-dans-lair-partie-4-purification-sur-resine-otm-45","title":{"rendered":"PFAS dans l\u2019air, Partie 4 : Purification sur r\u00e9sine (OTM-45)"},"content":{"rendered":"\n<p>Dans les articles pr\u00e9c\u00e9dents, j\u2019ai donn\u00e9 un <a href=\"https:\/\/discover.restek.com\/blogs-zh\/gnbl4767\/pfas-in-air-part-1-otm-45\" data-type=\"link\" data-id=\"https:\/\/discover.restek.com\/gnbl4767\/pfas-in-air-part-1-otm-45\/\">aper\u00e7u g\u00e9n\u00e9ral de l&#8217;OTM-45<\/a>, parl\u00e9 de la <a href=\"https:\/\/discover.restek.com\/blogs-zh\/gnbl4768\/pfas-in-air-part-2-otm-45-chromatography\" data-type=\"link\" data-id=\"https:\/\/discover.restek.com\/gnbl4768\/pfas-in-air-part-2-otm-45-chromatography\/\">chromatographie<\/a> que j\u2019ai pu obtenir, et discut\u00e9 des <a href=\"https:\/\/discover.restek.com\/blogs-zh\/gnbl4769\/pfas-in-air-part-3-otm-45-calibrations\" data-type=\"link\" data-id=\"https:\/\/discover.restek.com\/gnbl4769\/pfas-in-air-part-3-otm-45-calibrations\/\">exigences de calibration<\/a> dict\u00e9es par la m\u00e9thode et des probl\u00e8mes que j\u2019ai rencontr\u00e9s avec celles-ci. Dans cet article, nous discuterons des proc\u00e9dures de purification sur r\u00e9sine en utilisant un syst\u00e8me Dionex ASE 350.<\/p>\n\n\n\n<p>Tout d\u2019abord, parlons un peu plus en d\u00e9tails de la purification sur r\u00e9sine. Restek propose une r\u00e9sine SDVB certifi\u00e9e Ultra-Pure, qui est \u00e9quivalente aux formes de r\u00e9sines XAD-2 pr\u00e9-nettoy\u00e9es d\u2019autres fabricants. Si vous d\u00e9cidez de ne pas choisir une r\u00e9sine SDVB Ultra-Pure ou une r\u00e9sine pr\u00e9-nettoy\u00e9e, l\u2019OTM-45 d\u00e9crit dans l\u2019annexe une proc\u00e9dure n\u00e9cessaire pour \u00e9liminer les sels ajout\u00e9s \u00e0 l\u2019XAD-2 pour \u00e9viter la croissance microbienne et la nettoyer compl\u00e8tement avant utilisation. Elle n\u00e9cessite un trempage d\u2019une nuit compl\u00e8te dans l\u2019eau, une extraction Soxhlet de 8 heures avec de l\u2019eau chaude, une extraction Soxhlet de 22 heures avec du m\u00e9thanol, une extraction Soxhlet de 22 heures avec du chlorure de m\u00e9thyl\u00e8ne et une extraction Soxhlet finale de 22 heures avec 5% d\u2019hydroxyde d\u2019ammonium dans le m\u00e9thanol. Enfin, la r\u00e9sine est s\u00e9ch\u00e9e \u00e0 l\u2019aide d\u2019azote, et la m\u00e9thode note que pour s\u00e9cher 500g de r\u00e9sine XAD-2, il faudra un Dewar complet de 160 L d\u2019azote liquide utilis\u00e9 pendant une nuit. Tout cela peut donc repr\u00e9senter jusqu\u2019\u00e0 une semaine compl\u00e8te de travail, plus l\u2019utilisation de solvants et d\u2019azote. Il semble donc \u00e9vident de commencer \u00e0 travailler avec notre r\u00e9sine SDVB Ultra-Pure \u00e0 la place.<\/p>\n\n\n\n<p>Cela \u00e9tant dit, notre r\u00e9sine Ultra-Pure et les r\u00e9sines XAD-2 pr\u00e9-nettoy\u00e9es d\u2019autres fournisseurs ont encore une contamination r\u00e9siduelle en PFAS. Heureusement, utiliser une r\u00e9sine pr\u00e9-nettoy\u00e9e facilite le proc\u00e9d\u00e9 de nettoyage, et vous n\u2019avez donc pas \u00e0 faire le nettoyage complet d\u00e9crit pour la r\u00e9sine brute dans l\u2019OTM-45. May&nbsp;<a title=\"Accelerated Solvent Extraction of Airborne Per- and Polyfluoroalkyl Substances from StyreneDivinylbenzene Resin\" href=\"https:\/\/apps.nelac-institute.org\/nemc\/2021\/docs\/presentations\/pdf\/8-3-21-Air%20Monitoring,%20Methods,%20and%20Technology-6.01-Hoisington.pdf\" target=\"_blank\" rel=\"noopener\" data-lf-fd-inspected-ywvko4xd9od4z6bj=\"true\" data-uw-pdf-br=\"2\" aria-label=\"2021 NEMC presentation - opens in new tab\" data-uw-rm-ext-link=\"\" data-uw-pdf-doc=\"\">pr\u00e9sentation NEMC 2021 <\/a>&nbsp;parlait un peu de cela et de mon utilisation de l\u2019extraction acc\u00e9l\u00e9r\u00e9e par solvant (ASE) pour purifier et extraire sur r\u00e9sine comme alternative aux extractions Soxhlet et &#8220;Shakeout&#8221;. L\u2019utilisation de l\u2019ASE permet une purification simple, beaucoup plus rapide et qui utilise beaucoup moins de solvants que les autres m\u00e9thodes. Les param\u00e8tres ASE utilis\u00e9s sont pr\u00e9sent\u00e9s dans le Tableau 1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Param\u00e8tres Dionex ASE 350<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pression &#8211; 1500 psi<\/li>\n\n\n\n<li>Temp\u00e9rature &#8211; 120\u00b0 C<\/li>\n\n\n\n<li>Temps de chauffe &#8211; 6 minutes<\/li>\n\n\n\n<li>Temps statique &#8211; 15 minutes<\/li>\n\n\n\n<li>Cycles &#8211; 2<\/li>\n\n\n\n<li>Volume de rin\u00e7age &#8211; 60%<\/li>\n\n\n\n<li>Solvant &#8211; 4:1 M\u00e9thanol:Ac\u00e9tonitrile<\/li>\n<\/ul>\n\n\n\n<p>Tableau 1 \u2013 M\u00e9thode ASE initiale pour la purification et l\u2019extraction sur r\u00e9sine.<\/p>\n\n\n\n<p>Lors des essais de purification\/extraction avec la r\u00e9sine SDVB Ultra-Pure et la r\u00e9sine XAD-2 pr\u00e9-nettoy\u00e9e, les deux r\u00e9sines ont montr\u00e9 une contamination assez significative pour les 3 compos\u00e9s PFAS indiqu\u00e9s dans le Tableau 2.<\/p>\n\n\n\n<figure class=\"wp-block-table table table-bordered\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Compos\u00e9<\/strong><\/td><td><strong>ASE Blank (ng\/g)<\/strong><\/td><td><strong>XAD-2 (ng\/g)<\/strong><\/td><td><strong>XAD-2 (ng\/g)<\/strong><\/td><td><strong>XAD-2 (ng\/g)<\/strong><\/td><td><strong>Avg. (ng\/g)<\/strong><\/td><td><strong>Ultra Clean Resin (ng\/g)<\/strong><\/td><td><strong>Ultra Clean Resin (ng\/g)<\/strong><\/td><td><strong>Ultra Clean Resin (ng\/g)<\/strong><\/td><td><strong>Avg. (ng\/g)<\/strong><\/td><\/tr><tr><td>PFBA<\/td><td>0.05<\/td><td>0.54<\/td><td>0.51<\/td><td>0.60<\/td><td><strong>0.55<\/strong><\/td><td>0.43<\/td><td>0.35<\/td><td>0.43<\/td><td><strong>0.40<\/strong><\/td><\/tr><tr><td>PF4OPeA<\/td><td>0.09<\/td><td>0.10<\/td><td>0.11<\/td><td>0.10<\/td><td><strong>0.10<\/strong><\/td><td>0.63<\/td><td>0.45<\/td><td>0.53<\/td><td><strong>0.54<\/strong><\/td><\/tr><tr><td>ADONA<\/td><td>&lt;0.04<\/td><td>0.05<\/td><td>0.05<\/td><td>0.11<\/td><td><strong>0.71<\/strong><\/td><td>0.06<\/td><td>0.04<\/td><td>0.05<\/td><td><strong>0.05<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Tableau 2 \u2013 R\u00e9sultats des blancs post purification\/extraction ASE sur les r\u00e9sines XAD-2 et SDVB Ultra-Pure. Le blanc ASE \u00e9tait une cellule ASE vide pour d\u00e9terminer le bruit de fond provenant de l\u2019instrument.<\/p>\n\n\n\n<p>Apr\u00e8s avoir pris connaissance de ces r\u00e9sultats, j\u2019ai d\u00e9cid\u00e9 d\u2019effectuer une seconde extraction ASE sur les r\u00e9sines afin de voir si la premi\u00e8re \u00e9tait suffisante pour les nettoyer. Les r\u00e9sultats \u00e9taient un peu inattendus. Alors que la r\u00e9sine SDVB Ultra-Pure montrait une diminution de la contamination en PFBA et PF4OPeA (sans changement pour l\u2019ADONA), la r\u00e9sine XAD-2 n\u2019a montr\u00e9 aucune am\u00e9lioration pour le PFBA et l\u2019ADONA et m\u00eame une augmentation de la contamination en PF4OPeA, comme le montre le Tableau 3.<\/p>\n\n\n\n<figure class=\"wp-block-table table table-bordered\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Compound<\/strong><\/td><td><strong>XAD-2 (ng\/g)<\/strong><\/td><td><strong>XAD-2 (ng\/g)<\/strong><\/td><td><strong>XAD-2 (ng\/g)<\/strong><\/td><td><strong>Avg. (ng\/g)<\/strong><\/td><td><strong>Ultra Clean Resin (ng\/g)<\/strong><\/td><td><strong>Ultra Clean Resin (ng\/g)<\/strong><\/td><td><strong>Ultra Clean Resin (ng\/g)<\/strong><\/td><td><strong>Avg. (ng\/g)<\/strong><\/td><\/tr><tr><td>PFBA<\/td><td>0.29<\/td><td>0.24<\/td><td>0.28<\/td><td><strong>0.27<\/strong><\/td><td>0.12<\/td><td>0.18<\/td><td>0.10<\/td><td><strong>0.13<\/strong><\/td><\/tr><tr><td>PF4OPeA<\/td><td>0.37<\/td><td>0.29<\/td><td>0.24<\/td><td><strong>0.30<\/strong><\/td><td>0.06<\/td><td>0.09<\/td><td>0.10<\/td><td><strong>0.08<\/strong><\/td><\/tr><tr><td>ADONA<\/td><td>0.71<\/td><td>0.25<\/td><td>0.30<\/td><td><strong>0.42<\/strong><\/td><td>0.05<\/td><td>0.08<\/td><td>0.04<\/td><td><strong>0.06<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Tableau 3 \u2013 R\u00e9sultats d&#8217;une seconde extraction ASE sur les r\u00e9sines XAD-2 et SDVB Ultra-Pure.<\/p>\n\n\n\n<p>Il semblait donc que la m\u00e9thode d\u2019extraction ASE \u00e9tait moins efficace sur la r\u00e9sine XAD-2 que sur la r\u00e9sine SDVB Ultra-Pure car la r\u00e9sine XAD-2 avait une contamination plus importante en PFAS apr\u00e8s la seconde extraction. Une des raisons possibles \u00e0 cela est que l\u00e0 o\u00f9 la r\u00e9sine SDVB Ultra-Pure \u00e9tait s\u00e8che et coulait librement, la r\u00e9sine XAD-2 \u00e9tait, elle, l\u00e9g\u00e8rement humide et grumeleuse, comme le montre la Figure 4. Il est possible que l\u2019humidit\u00e9 de la r\u00e9sine lui ait permis de capter plus de PFAS. Cela a \u00e9galement complexifier la t\u00e2che, comme le montre le remplissage b\u00e2cl\u00e9 de la cellule ASE en Figure 1.<\/p>\n\n\n<div class=\"wp-block-custom-chromatogram-article-top\"><div class=\"chromatogram-article-placeholder\"><div class=\"figure-heading\">Figure 1 \u2013 Comparaison de la r\u00e9sine Restek SDVB Ultra-Pure et de la r\u00e9sine pr\u00e9-nettoy\u00e9e XAD-2.<\/div><div class='chromatogram-article-inner-full'><div class=\"chromatogram-article-inner\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"810\" height=\"498\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-pfas-in-air-part-4-otm-45-resin-cleaning-01.png\" alt=\"\" class=\"wp-image-16530\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-pfas-in-air-part-4-otm-45-resin-cleaning-01.png 810w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-pfas-in-air-part-4-otm-45-resin-cleaning-01-300x184.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-pfas-in-air-part-4-otm-45-resin-cleaning-01-768x472.png 768w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/figure>\n<\/div>\n<\/div><\/div><\/div>\n\n\n<p>Apr\u00e8s NEMC, j\u2019ai travaill\u00e9 un peu plus sur l\u2019optimisation d\u2019une m\u00e9thode de purification unique, dans l\u2019espoir d\u2019obtenir une m\u00e9thode ASE simple qui laisserait la r\u00e9sine SDVB Ultra-Pure sans contamination aux PFAS. J\u2019ai utilis\u00e9 un m\u00e9lange de chlorure de m\u00e9thyl\u00e8ne et de m\u00e9thanol, en esp\u00e9rant qu\u2019un solvant plus agressif serait plus efficace pour la purification. Les param\u00e8tres ASE utilis\u00e9s son indiqu\u00e9s dans le Tableau 4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dionex ASE 350 parameters<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pression &#8211; 1500 psi<\/li>\n\n\n\n<li>Temp\u00e9rature &#8211; 120\u00b0 C<\/li>\n\n\n\n<li>Temps de chauffe &#8211; 6 minutes<\/li>\n\n\n\n<li>Temps statique &#8211; 15 minutes<\/li>\n\n\n\n<li>Cycles &#8211; 2<\/li>\n\n\n\n<li>Volume de rin\u00e7age &#8211; 60%<\/li>\n\n\n\n<li>Solvent &#8211; 4:1 Methanol:MeCl<sub>2<\/sub><\/li>\n<\/ul>\n\n\n\n<p>TTableau 4 \u2013 M\u00e9thode finale de purification ASE pour la r\u00e9sine SDVB Ultra-Pure<\/p>\n\n\n\n<p>Alors, \u00e9tait-ce suffisant pour que ma r\u00e9sine soit compl\u00e8tement propre ? Malheureusement non car j\u2019ai retrouv\u00e9 une petite quantit\u00e9 de PFDA qui \u00e9tait l\u00e9g\u00e8rement au-dessus de ma limite de d\u00e9tection (dans un prochain article, je discuterai de la fa\u00e7on dont j\u2019ai atteint ces limites). Le Tableau 5 montre les r\u00e9sultats complets de ma purification.<\/p>\n\n\n\n<figure class=\"wp-block-table table table-bordered\"><table class=\"has-fixed-layout\"><tbody><tr><td>&nbsp;<\/td><td colspan=\"2\">ng PFAS\/g resin<\/td><\/tr><tr><td>\n<p>Compound<\/p>\n<\/td><td>\n<p>MDL<\/p>\n<\/td><td>\n<p>Blank Avg.<\/p>\n<\/td><\/tr><tr><td>\n<p>PFBA<\/p>\n<\/td><td>\n<p>0.06<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PF4OPeA<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>3:3 FTCA<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFPeA<\/p>\n<\/td><td>\n<p>0.03<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFBS<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PF5OHxA<\/p>\n<\/td><td>\n<p>0.01<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFEESA<\/p>\n<\/td><td>\n<p>0.01<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>3,6-OPFHpA<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>4-2 FTS<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFHxA<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFPeS<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>HFPO-DA<\/p>\n<\/td><td>\n<p>0.22<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFHpA<\/p>\n<\/td><td>\n<p>0.10<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>5:3 FTCA<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FHUEA<\/p>\n<\/td><td>\n<p>0.06<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFHxS<\/p>\n<\/td><td>\n<p>0.06<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FHEA<\/p>\n<\/td><td>\n<p>0.09<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>ADONA<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFeCHS<\/p>\n<\/td><td>\n<p>0.03<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>6-2 FTS<\/p>\n<\/td><td>\n<p>0.02<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFHpS<\/p>\n<\/td><td>\n<p>0.03<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFOA<\/p>\n<\/td><td>\n<p>0.22<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFOS<\/p>\n<\/td><td>\n<p>0.04<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FOUEA<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFNA<\/p>\n<\/td><td>\n<p>0.06<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FHpPA<\/p>\n<\/td><td>\n<p>0.14<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FOEA<\/p>\n<\/td><td>\n<p>0.18<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>9Cl-PF3ONS<\/p>\n<\/td><td>\n<p>0.03<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>L-PFNS<\/p>\n<\/td><td>\n<p>0.18<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFDA<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><\/tr><tr><td>\n<p>8-2 FTS<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>L-PFDS<\/p>\n<\/td><td>\n<p>0.32<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FDEA<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFUnA<\/p>\n<\/td><td>\n<p>0.08<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>11Cl-PF3OUdS<\/p>\n<\/td><td>\n<p>0.04<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>FOSA-I<\/p>\n<\/td><td>\n<p>0.13<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>10:2 FTS<\/p>\n<\/td><td>\n<p>0.04<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFDoA<\/p>\n<\/td><td>\n<p>0.10<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFDoS<\/p>\n<\/td><td>\n<p>0.06<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>N-MeFOSA-M<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>N-MeFOSE<\/p>\n<\/td><td>\n<p>0.07<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>N-MeFOSAA<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFHxDA<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>N-EtFOSA-M<\/p>\n<\/td><td>\n<p>0.17<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>N-EtFOSE-M<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>N-EtFOSAA<\/p>\n<\/td><td>\n<p>0.08<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFODA<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFTrDA<\/p>\n<\/td><td>\n<p>0.08<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><tr><td>\n<p>PFTA<\/p>\n<\/td><td>\n<p>0.05<\/p>\n<\/td><td>\n<p>&lt;MDL<\/p>\n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Tableau 5 \u2013 R\u00e9sultats des blancs PFAS pour la r\u00e9sine SDVB Ultra-Pure apr\u00e8s purification.<\/p>\n\n\n\n<p>Pourquoi vois-je du PFDA maintenant alors qu\u2019il n\u2019\u00e9tait pas pr\u00e9sent dans mes \u00e9tudes initiales de purification ? Eh bien, d\u2019apr\u00e8s mon exp\u00e9rience dans l\u2019analyse des PFAS, la contamination est une chose impr\u00e9visible, et des discussions avec d\u2019autres laboratoires semblent confirmer cela. Des solvants et des consommables qui \u00e9taient exempts de PFAS dans des lots pr\u00e9c\u00e9dents peuvent pr\u00e9senter une contamination aux PFAS dans de nouveaux lots, une surveillance constante des niveaux des blancs est donc cruciale. Obtenir une analyse compl\u00e8te sans PFAS est un peu comme un jeu (de laboratoire) ; un jour vous devez faire face au PFBA de vos bouteilles et le jour d\u2019apr\u00e8s au PFBS de votre solvant. Avec seulement 1 compos\u00e9 sur 49 montrant un petit signal, j\u2019\u00e9tais suffisamment satisfait pour continuer \u00e0 tester d\u2019autres proc\u00e9d\u00e9s d\u2019extraction. J\u2019en parlerai dans un prochain article, dans lequel je comparerai l\u2019extraction ASE \u00e0 la m\u00e9thode &#8220;Shake Out&#8221; demand\u00e9e dans l\u2019OTM-45.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Dans les articles pr&eacute;c&eacute;dents, j&rsquo;ai donn&eacute; un aper&ccedil;u g&eacute;n&eacute;ral de l&#8217;OTM-45, , parl&eacute; de la chromatographie que j&rsquo;ai pu obtenir, et discut&eacute; des exigences de calibration dict&eacute;es par la m&eacute;thode et des probl&egrave;mes que j&rsquo;ai rencontr&eacute;s avec celles-ci. Dans cet article, nous discuterons des proc&eacute;dures de purification sur r&eacute;sine en utilisant un syst&egrave;me Dionex ASE 350.<\/p>\n","protected":false},"author":27,"featured_media":0,"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":[816,791],"tags":[2782],"industries-application":[2212,2209,2208],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[2315],"ppma_author":[447],"class_list":["post-48545","post","type-post","status-publish","format-standard","hentry","category-communiques-de-presse-actualites","category-blog-fr","tag-pfas","industries-application-analyse-de-pfas","industries-application-analyses-de-lair","industries-application-environnement","resource-technique-echantillonnage-dair"],"acf":[],"taxonomy_info":{"category":[{"value":816,"label":"Communiqu\u00e9s 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