GB 31604.31-2025 English PDFUS$459.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 31604.31-2025: National food safety standard - Food contact materials and products - Determination of residual and migration of vinyl chloride, 1,1-dichloroethylene and 1,1-dichloroethane Status: Valid GB 31604.31: Historical versions
Basic dataStandard ID: GB 31604.31-2025 (GB31604.31-2025)Description (Translated English): National food safety standard - Food contact materials and products - Determination of residual and migration of vinyl chloride, 1,1-dichloroethylene and 1,1-dichloroethane Sector / Industry: National Standard Classification of Chinese Standard: X09 Word Count Estimation: 23,212 Date of Issue: 2025-03-16 Date of Implementation: 2025-09-16 Issuing agency(ies): National Health Commission of the People's Republic of China, State Administration for Market Regulation GB 31604.31-2025: National food safety standard - Food contact materials and products - Determination of residual and migration of vinyl chloride, 1,1-dichloroethylene and 1,1-dichloroethane---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. GB 31604.31-2025 English version. National food safety standard - Food contact materials and products - Determination of residual and migration of vinyl chloride, 1,1-dichloroethylene and 1,1-dichloroethane National Standard of the People's Republic of China National Food Safety Standards Food contact materials and products Vinyl chloride, 1,1- The residual amount of ethylene dichloride and 1,1-dichloroethane and Determination of migration amount Released on 2025-03-16 2025-09-16 Implementation National Health Commission of the People's Republic of China The State Administration for Market Regulation issued ForewordThis standard replaces GB 31604.31-2016 “National Food Safety Standard for Food Contact Materials and Products - Determination and Migration of Vinyl Chloride” Determination of displacement. Compared with GB 31604.31-2016, the main changes of this standard are as follows. --- Changed the standard name; --- Changed the scope of application; ---1,1-dichloroethylene and 1,1-dichloroethane were added to the detection targets; --- The gas chromatography method was changed from the original GC-FID method to the GC-ECD method, and it was used as the first method; ---Gas chromatography-mass spectrometry was added as the second method. National Food Safety Standards Food contact materials and products Vinyl chloride, 1,1- The residual amount of ethylene dichloride and 1,1-dichloroethane and Determination of migration amount1 ScopeThis standard specifies the residual and migration amounts of vinyl chloride, 1,1-dichloroethylene and 1,1-dichloroethane in food contact materials and their products. Determination method. This standard applies to vinyl chloride, 1,1-dichloroethylene in plastics, coatings, adhesives, paper and paper products, inks and other food contact materials and products. Determination of residual and migration amounts of olefins and 1,1-dichloroethane. Chapter 1 Determination of Residual Content of Vinyl Chloride, 1,1-Dichloroethylene and 1,1-Dichloroethane Method 1 Gas Chromatography2 PrincipleThe sample is placed in a headspace bottle, dissolved or fully dispersed in N,N-dimethylacetamide, and heated to make the components to be tested, vinyl chloride, 1,1-dichloro Ethylene and 1,1-dichloroethane reach gas-liquid equilibrium. Quantitatively draw the gas above the liquid and inject it into the gas chromatograph for component separation. The product was detected by ECD, qualitative analysis was performed based on retention time, and quantitative analysis was performed based on peak area using external standard method.3 Reagents and MaterialsUnless otherwise specified, all reagents used in this method were of analytical grade and the water was first-grade water as specified in GB/T 6682. 3.1 Reagents N,N-Dimethylacetamide. Purity greater than 99%. 3.2 Standards 3.2.1 Vinyl chloride (C2H3Cl, CAS No.. 75-01-4). Standard solution certified by the state and granted with a standard substance certificate, with a concentration of 1000mg/L, using methanol as solvent. 3.2.2 1,1-Dichloroethylene (C2H2Cl2, CAS No.. 75-35-4). purity ≥ 99.5%, or certified by the state and granted a standard material certificate Standard substances. 3.2.3 1,1-Dichloroethane (C2H4Cl2, CAS No.. 75-34-3). purity ≥ 99.5%, or certified by the state and granted a standard material certificate Standard substances. Note. All three substances are highly volatile. Standards should be sealed and stored in a refrigerated and light-proof environment. Once opened, the product should be used immediately and cannot be resealed for use as a standard product. When using standard products, personal protection should be taken to avoid inhalation. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 31604.31-2025_English be delivered?Answer: Upon your order, we will start to translate GB 31604.31-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB 31604.31-2025_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 31604.31-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
