Plastic testing for food packaging

This standard specifies the determination method of bisphenol A in food simulants. This standard is applicable to the determination of bisphenol A content in four food simulants: water, 3% (mass concentration) acetic acid solution, 10% (volume fraction) ethanol solution, and olive oil. The lower limit for the determination of bisphenol A in three water-based food simulants: acetic acid solution with a mass concentration of 3% and ethanol solution with a volume fraction of 10% is 0 The lower limit for the determination of bisphenol A in 03 mg/L. olive oil is 0 3 mg/kg. 2 normative references: The clauses in the following documents have become clauses of this standard through reference in this standard. All dated references, subsequent amendments (excluding corrected content), or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. The latest version of any undated reference document is applicable to this standard. GB/T 6682 Specification and Test Methods for Analytical Laboratory Water (GB/T 6682-2008, IS0 3696:1987, MOD). GB/T 23296.1-2009 Food contact materials - Restricted substances in plastics - Specific migration tests and content determination methods for food crystals and food simulants in plastics, as well as guidelines for selecting exposure conditions for food simulants. Principle 3: Bisphenol A in food simulants is separated by high-performance liquid chromatography column and detected by fluorescence detector. The water-based food simulant is directly injected, while the olive oil simulant is extracted by methanol solution before injection. Quantitative analysis using external standard method. Unless otherwise specified, water shall be grade - according to GB/T6682. All reagents and materials shall be analytical pure. 4.1 Bisphenol A (CsHu. Oz. CAS No. 80-05-7): Purity greater than 99%. 4.2 Glacial acetic acid. 4.3 Anhydrous ethanol. 4.4 Refined olive oil. 4.5 n-hexane: chromatographically pure. 4.6 Methanol: Chromatically pure. 4.73% (mass concentration) acetic acid solution: Weigh 30 (accurate to 0.1 g) glacial acetic acid (4.2) into a 1 L volumetric flask and bring to volume with water. 4.8 10% (volume fraction) ethanol solution: Measure 100 mL of anhydrous ethanol (4.3) into a 1 L volumetric flask and bring to volume with water. 4.9 Methanol water mixture (1+1): Measure 100 mL of methanol (4.6) and 100 mL of water. Mix well. 4.10 Bisphenol A stock solution (375 mg/L): Accurately weigh 37.5 mg of bisphenol A (accurate to 0.1 mg) (4 1) Transfer to a 100 mL volumetric flask and bring to volume with methanol (4.6). Store in dark at a temperature of -20 ° C to 20 ° C, and the concentration of the sealed bisphenol A stock solution remains stable for 3 months. 4.11 Bisphenol A standard intermediate solution (37.5 mg/L): Take 10 mL of bisphenol A stock solution (4.10) into a 100 mL volumetric flask. Use methanol (4 6) Fixed volume

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