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This standard replaces GB/T 23243-2009 "Determination of perfluorooctane sulfonyl compounds (PFOS) in food packaging materials - High performance liquid chromatography tandem mass spectrometry" p> Compared with GB/T23243-2009, the main changes in this standard are as follows: - The name of the standard has been changed to "National Food Safety Standard for the Determination of Octane Sulfonic Acid (PFOS) and Perfluorooctanoic Acid (PFOA) in Food Contact Materials and Products" p> - Added the scope of application of the standard p> - Added the determination object perfluorooctanoic acid (PFOA) p> - Added sample preparation method: - Added purification step, using weak anion exchange solid-phase extraction column for purification p> - Improved the sensitivity of the detection method P> Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China |