{"id":20721,"date":"2024-11-16T15:42:55","date_gmt":"2024-11-16T15:42:55","guid":{"rendered":"https:\/\/sustainabilityservices.eurofins.com\/sin-categorizar\/us-cbp-publishes-isotopic-testing-guidance-for-uflpa-compliance\/"},"modified":"2026-03-27T08:55:09","modified_gmt":"2026-03-27T08:55:09","slug":"us-cbp-publishes-isotopic-testing-guidance-for-compliance","status":"publish","type":"post","link":"https:\/\/sustainabilityservices.eurofins.com\/es\/news-es\/us-cbp-publishes-isotopic-testing-guidance-for-compliance\/","title":{"rendered":"US CBP publishes isotopic testing guidance"},"content":{"rendered":"<p>On 11 November 2024, the U.S. Customs and Border Protection (CBP) published new guidance on the use of <a href=\"https:\/\/sustainabilityservices.eurofins.com\/es\/?p=21045\" target=\"_blank\" rel=\"noopener\">isotopic testing for supply chain traceability<\/a>, a tool with growing importance for importers seeking to access the U.S. market. This document, titled \u00abIsotopic Testing Guidance,\u00bb details how this scientific method can be used to <a href=\"https:\/\/sustainabilityservices.eurofins.com\/es\/?p=21042\" target=\"_blank\" rel=\"noopener\">verify the origin of goods<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<h2>What is isotopic testing?<\/h2>\n<p>Isotopic testing examines the unique atomic structure of materials, revealing a \u00abfingerprint\u00bb influenced by the environmental conditions where a product was grown or produced. By comparing this fingerprint to a library of similar materials from different geographic regions, isotopic testing can determine if the tested material&#8217;s origin matches its claimed origin.<\/p>\n<p>&nbsp;<\/p>\n<h2>CBP&#8217;s guidance for importers using isotopic testing<\/h2>\n<ul>\n<li><strong>Selecting a test provider:<\/strong> The guidance outlines key factors for selecting a provider, such as adherence to best practices, accreditation under ISO\/IEC 17025, the size and quality of their reference library, statistical modeling capabilities, and participation in proficiency testing programmes<\/li>\n<li><strong>Testing methods<\/strong>: While no standardised method exists for isotopic testing, labs should be able to <a href=\"https:\/\/sustainabilityservices.eurofins.com\/es\/?p=21045\" target=\"_blank\" rel=\"noopener\">analyse stable isotope ratios<\/a> using isotope ratio mass spectrometry (IRMS). Methods for isolating cotton from blended fabrics for testing should be clearly explained by the provider<\/li>\n<li><strong>Test reports:<\/strong> The guidance details essential elements of a comprehensive test report, including a description and photographs of the product, claimed origin, analytical results, the method used, and a unique identifier. Importers should be aware that while a single report may apply to multiple shipments, it is the importer&#8217;s responsibility to demonstrate this connection with evidence like style numbers or purchase orders<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Why use isotopic testing?<\/h2>\n<p>While not mandatory, isotopic testing allows importers to verify supply chains, demonstrate due diligence, and determine raw material sources. It can be a valuable part of a broader supply chain tracing and risk management programme.<\/p>\n<p>CBP accepts isotopic test reports as evidence of origin. These reports, along with other supply chain tracing documents, can be submitted to the port of entry or the importer&#8217;s assigned Center of Excellence and Expertise.<\/p>\n<p>The CBP&#8217;s \u00abIsotopic Testing Guidance\u00bb is available on the CBP website and is a crucial resource for importers who want to understand and utilise isotopic testing.<\/p>\n<p>&nbsp;<\/p>\n<h2>How Eurofins can assist<\/h2>\n<p>Eurofins offers <a href=\"https:\/\/sustainabilityservices.eurofins.com\/es\/?p=21042\" target=\"_blank\" rel=\"noopener\">comprehensive cotton origin verification testing<\/a>. Our services utilise advanced Stable Isotope Ratio Analysis (SIRA) technology to ensure the claimed origin of cotton is accurately verified. Our unique approach includes a dynamic reference library, expert interpretation, and tailored guidance to help clients navigate complex compliance requirements confidently.<\/p>\n<p>&nbsp;<\/p>\n<h2>Next steps<\/h2>\n<p>For questions and additional information on how Eurofins can support your organisation in verifying origin of products using isotopic testing, please contact Peter Hughes (&#x0070;&#x0065;&#116;&#x0065;&#x0072;.h&#x0075;&#103;h&#x0065;&#115;&#64;&#x0063;p&#x0074;.&#x0065;&#117;&#114;o&#102;&#105;&#x006e;&#x0073;&#x0065;&#x0075;&#46;&#x0063;&#111;&#x006d;, +44 7542 857007) or Dr. Pratik Ichhaporia (&#x0070;&#114;&#97;t&#105;&#x006b;&#46;i&#99;&#104;&#104;apo&#x0072;&#105;&#97;&#64;c&#112;&#116;&#46;eu&#114;&#x006f;&#x0066;&#x0069;&#110;&#x0073;&#117;&#115;&#46;&#99;&#x006f;&#109;,+1-669-837-2257).<\/p>\n<p>&nbsp;<\/p>\n<p>CBP Isotopic testing guidance document: <a href=\"https:\/\/www.cbp.gov\/sites\/default\/files\/2024-11\/isotopic-testing-guide_11-08-24_eac_updatesfinal_v2_508.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/www.cbp.gov\/sites\/default\/files\/2024-11\/isotopic-testing-guide_11-08-24_eac_updatesfinal_v2_508.pdf<\/a><br \/>\nEurofins Cotton Origin verification service: <a href=\"https:\/\/sustainabilityservices.eurofins.com\/es\/?p=21042\" target=\"_blank\" rel=\"noopener\">https:\/\/sustainabilityservices.eurofins.com\/services\/cotton-origin-verification-testing\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>On 11 November 2024, the U.S. Customs and Border Protection (CBP) published new guidance on the use of isotopic testing for supply chain traceability, a tool with growing importance for importers seeking to access the U.S. market.<\/p>\n","protected":false},"author":24,"featured_media":20265,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","wds_primary_category":1,"footnotes":""},"categories":[88],"tags":[],"class_list":["post-20721","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-es"],"acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-05-07 14:47:45","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/posts\/20721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/comments?post=20721"}],"version-history":[{"count":1,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/posts\/20721\/revisions"}],"predecessor-version":[{"id":29079,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/posts\/20721\/revisions\/29079"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/media\/20265"}],"wp:attachment":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/media?parent=20721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/categories?post=20721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/es\/wp-json\/wp\/v2\/tags?post=20721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}