{"id":650,"date":"2025-07-14T18:14:20","date_gmt":"2025-07-14T18:14:20","guid":{"rendered":"https:\/\/live-discover-restek.pantheonsite.io\/?p=650"},"modified":"2026-04-02T14:42:15","modified_gmt":"2026-04-02T14:42:15","slug":"which-pieces-of-documentation-are-available-with-my-certificate-of-analysis-cofa","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/es\/faq-fr\/gnot4935\/which-pieces-of-documentation-are-available-with-my-certificate-of-analysis-cofa","title":{"rendered":"Which pieces of documentation are available with my Certificate of Analysis (CofA)?"},"content":{"rendered":"\n<p>Restek offers three different types of Certificate of Analysis: gravimetric, chromatographic, and chromatographic plus. Each provides different pieces of documentation, which are outlined in the graphic below:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"393\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-GNOT3397B-01a-1024x393.jpg\" alt=\"Outline of which pieces of documentation are included with Certificate of Analysis.\" class=\"wp-image-35925\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-GNOT3397B-01a-1024x393.jpg 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-GNOT3397B-01a-300x115.jpg 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-GNOT3397B-01a-768x295.jpg 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-GNOT3397B-01a-1536x590.jpg 1536w, https:\/\/discover.restek.com\/wp-content\/uploads\/figure-article-GNOT3397B-01a.jpg 1800w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Nearly all our stock reference standards are provided with the highest level of documentation available\u2014Certificate of Analysis (Chromatographic Plus)\u2014and we provide all three options for most of our custom reference standards. Reference standards that fall within our ISO scopes of accreditation will be classified as certified reference materials (CRMs) regardless of documentation level.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Certificate of Analysis&nbsp;<em>gravimetric<\/em><\/strong>&nbsp;includes all raw material information, lot numbers and purity, isomer ratios for isomeric compounds, and calculated concentration(s). Associated uncertainties are also included for Certified Reference Materials (CRMs).<\/li>\n\n\n\n<li><strong>Certificate of Analysis&nbsp;<em>chromatographic<\/em><\/strong>&nbsp;includes all raw material information, lot numbers and purity, isomer ratios for isomeric compounds, and calculated concentration(s). Associated uncertainties are also included for Certified Reference Materials (CRMs). Additionally, a single sample is withdrawn from the packaged units and is tested via an appropriate technique to verify mixture composition. A chromatogram of the analyzed standard, with each peak identified, is included on the certificate.<\/li>\n\n\n\n<li><strong>Certificate of Analysis&nbsp;<em>chromatographic plus<\/em><\/strong>&nbsp;includes all raw material information, lot numbers and purity, isomer ratios for isomeric compounds, and calculated concentration(s). Associated uncertainties are also included for Certified Reference Materials (CRMs). Additionally, a sample of the packaged units is analyzed in triplicate and the peak areas are statistically compared to a second lot\u2014either a previous lot (if available) or a freshly produced independent second lot. A chromatogram of the analyzed standard, with each peak identified, is included on the certificate. Plus, a detailed data pack containing the product certificate, all quantitative assay data and statistics, and the Reference Material Batch Record are available at&nbsp;<a href=\"https:\/\/www.restek.com\/documentation-search\" target=\"_blank\" rel=\"noreferrer noopener\">www.restek.com\/documentation<\/a><\/li>\n<\/ul>\n\n\n\n<p>For more information, see&nbsp;GNBR1845.pdf (below).<\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/discover.restek.com\/wp-content\/uploads\/GNBR1845.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of GNBR1845.\"><\/object><a id=\"wp-block-file--media-1ade9d2e-2115-4c18-86b1-57b249d73a1f\" href=\"https:\/\/discover.restek.com\/wp-content\/uploads\/GNBR1845.pdf\">GNBR1845<\/a><a href=\"https:\/\/discover.restek.com\/wp-content\/uploads\/GNBR1845.pdf\" class=\"wp-block-file__button wp-element-button\" aria-describedby=\"wp-block-file--media-1ade9d2e-2115-4c18-86b1-57b249d73a1f\" download>Download<\/a><\/div>\n\n\n\n<div class=\"wp-block-group hub-fullwidth-container\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><style>.kadence-column650_47169d-1d > .kt-inside-inner-col,.kadence-column650_47169d-1d > .kt-inside-inner-col:before{border-top-left-radius:16px;border-top-right-radius:16px;border-bottom-right-radius:16px;border-bottom-left-radius:16px;}.kadence-column650_47169d-1d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column650_47169d-1d > .kt-inside-inner-col{flex-direction:column;}.kadence-column650_47169d-1d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column650_47169d-1d > .kt-inside-inner-col{background-image:url('https:\/\/discover.restek.com\/wp-content\/uploads\/standards-finder-footer-ad-desktop.jpg');background-size:cover 100%;background-position:74% 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.kt-inside-inner-col,.kadence-column650_b5d1dc-1c > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column650_b5d1dc-1c > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column650_b5d1dc-1c > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:flex-start;}.kadence-column650_b5d1dc-1c > .kt-inside-inner-col > .kb-image-is-ratio-size{align-self:stretch;}.kadence-column650_b5d1dc-1c > .kt-inside-inner-col > .wp-block-kadence-advancedgallery{align-self:stretch;}.kadence-column650_b5d1dc-1c > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column650_b5d1dc-1c{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column650_b5d1dc-1c{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column650_b5d1dc-1c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column650_b5d1dc-1c > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column650_b5d1dc-1c{position:relative;}.kadence-column650_b5d1dc-1c, .kt-inside-inner-col > .kadence-column650_b5d1dc-1c:not(.specificity){margin-top:var(--global-kb-spacing-xs, 1rem);margin-bottom:var(--global-kb-spacing-xs, 1rem);}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column650_b5d1dc-1c{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column650_b5d1dc-1c{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column650_b5d1dc-1c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column650_b5d1dc-1c > 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.wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae[data-kb-block=\"kb-adv-heading650_7ae1ea-ae\"]{padding-right:0px;padding-left:0px;text-align:left;font-size:40px;font-weight:400;font-style:normal;font-family:Inter;text-transform:none;}.wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae[data-kb-block=\"kb-adv-heading650_7ae1ea-ae\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae[data-kb-block=\"kb-adv-heading650_7ae1ea-ae\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae, .wp-block-kadence-advancedheading.kt-adv-heading650_7ae1ea-ae[data-kb-block=\"kb-adv-heading650_7ae1ea-ae\"]{font-size:36px;}}<\/style>\n<h2 class=\"kt-adv-heading650_7ae1ea-ae wp-block-kadence-advancedheading has-theme-palette-9-color has-text-color\" data-kb-block=\"kb-adv-heading650_7ae1ea-ae\"><strong>Find Reference Standards Fast<\/strong><\/h2>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading650_4e3855-04, .wp-block-kadence-advancedheading.kt-adv-heading650_4e3855-04[data-kb-block=\"kb-adv-heading650_4e3855-04\"]{padding-right:0px;padding-left:0px;margin-top:10px;margin-bottom:10px;text-align:left;font-size:26px;font-weight:400;font-style:normal;font-family:Inter;text-transform:none;}.wp-block-kadence-advancedheading.kt-adv-heading650_4e3855-04 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading650_4e3855-04[data-kb-block=\"kb-adv-heading650_4e3855-04\"] 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.wp-block-kadence-advancedheading.kt-adv-heading650_4fd9a9-e5[data-kb-block=\"kb-adv-heading650_4fd9a9-e5\"]{text-align:center;font-size:22px;line-height:22px;font-weight:400;font-style:normal;font-family:Inter;text-transform:none;}.wp-block-kadence-advancedheading.kt-adv-heading650_4fd9a9-e5 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading650_4fd9a9-e5[data-kb-block=\"kb-adv-heading650_4fd9a9-e5\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading650_4fd9a9-e5 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading650_4fd9a9-e5[data-kb-block=\"kb-adv-heading650_4fd9a9-e5\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading650_4fd9a9-e5, 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today.<\/em><\/h2>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns650_e1d4a0-c5{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns650_e1d4a0-c5 .kt-button{font-weight:normal;font-style:normal;}.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn.kt-btns650_e1d4a0-c5, .site .entry-content 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Sans';font-weight:600;border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-right-radius:8px;border-bottom-left-radius:8px;border-top:0px solid #1b3f73;border-right:0px solid #1b3f73;border-bottom:0px solid #1b3f73;border-left:0px solid #1b3f73;padding-top:12px;padding-right:50px;padding-bottom:12px;padding-left:50px;}.kb-btn650_ece5b7-8d.kb-button .kb-svg-icon-wrap{font-size:16px;--kb-button-icon-size:16px;}.wp-block-kadence-advancedbtn .kb-btn650_ece5b7-8d.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn650_ece5b7-8d.kb-button:focus{color:#0c115b;background:var(--global-palette9, #ffffff);}@media all and (max-width: 1024px){.wp-block-kadence-advancedbtn .kb-btn650_ece5b7-8d.kb-button{border-top:0px solid #1b3f73;border-right:0px solid #1b3f73;border-bottom:0px solid #1b3f73;border-left:0px solid #1b3f73;}}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn .kb-btn650_ece5b7-8d.kb-button{border-top:0px solid #1b3f73;border-right:0px solid 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chromatographic plus. Each provides different pieces of documentation, which are outlined in the graphic below: Nearly all our stock reference standards are provided with the highest level of documentation available\u2014Certificate of Analysis (Chromatographic Plus)\u2014and we provide all three options for most of our&#8230;<\/p>\n","protected":false},"author":11,"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":[801],"tags":[2705,2687],"industries-application":[],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[],"hf_cat_post":[625],"ppma_author":[414],"class_list":["post-650","post","type-post","status-publish","format-standard","hentry","category-faq-fr","tag-faq-general-reference-standards","tag-faq-reference-standards"],"acf":[],"taxonomy_info":{"category":[{"value":801,"label":"FAQ"}],"post_tag":[{"value":2705,"label":"FAQ: 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