{"id":20720,"date":"2024-11-16T15:42:55","date_gmt":"2024-11-16T15:42:55","guid":{"rendered":"https:\/\/sustainabilityservices.eurofins.com\/%e6%9c%aa%e5%88%86%e7%b1%bb\/us-cbp-publishes-isotopic-testing-guidance-for-uflpa-compliance\/"},"modified":"2026-03-27T08:55:07","modified_gmt":"2026-03-27T08:55:07","slug":"us-cbp-publishes-isotopic-testing-guidance-for-compliance","status":"publish","type":"post","link":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/news-zh-hans\/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\/zh-hans\/services-zh-hans\/traceability-solutions-using-stable-isotope-technology-sira\/\" 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 &#8220;Isotopic Testing Guidance,&#8221; details how this scientific method can be used to <a href=\"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/?p=21041\" 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 &#8220;fingerprint&#8221; 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\/zh-hans\/services-zh-hans\/traceability-solutions-using-stable-isotope-technology-sira\/\" 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 &#8220;Isotopic Testing Guidance&#8221; 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\/zh-hans\/?p=21041\" 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 (peter&#x002e;&#x0068;ug&#104;&#101;&#x0073;&#x0040;&#x0063;pt.&#101;u&#114;&#111;&#102;&#105;&#110;&#x0073;&#x0065;&#x0075;.co&#109;, +44 7542 857007) or Dr. Pratik Ichhaporia (&#x0070;&#114;&#x0061;ti&#107;&#46;&#x0069;&#x0063;&#104;&#104;&#x0061;p&#x006f;&#114;ia@&#x0063;&#112;t&#46;e&#117;ro&#102;&#x0069;&#x006e;s&#x0075;&#x0073;&#x002e;com,+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\/zh-hans\/?p=21041\" 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":20264,"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":[90],"tags":[],"class_list":["post-20720","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-zh-hans"],"acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-08-04 22:17:51","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/posts\/20720","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=20720"}],"version-history":[{"count":0,"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/posts\/20720\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/media\/20264"}],"wp:attachment":[{"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=20720"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=20720"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sustainabilityservices.eurofins.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=20720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}