Testing of contact materials and products for food use

This standard specifies the determination method for 2- (N.N-dimethylamino) ethanol in food simulants. This standard is applicable to the determination of 2- (N, N-dimethylamino) ethanol content in water-based food simulants such as water, 3% (mass concentration) acetic acid solution, 10% (volume fraction) ethanol solution, and olive oil. The lower limit for the determination of 2- (N, N-dimethylamino) ethanol in water-based food simulants is 2.2 mg/L, and the lower limit for the determination of 2- (N.N-dimethylamino) ethanol in olive oil is 2.2 mg/kg. 2 Normative References: The clauses in the following documents become the clauses of this standard through the reference surface of this standard. For dated reference documents, all 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. For undated references, the latest version applies to this standard. GB/T 6682 Specification and Test Methods for Analytical Laboratory Water (GB/T 6682-2008. ISO 36961987, MOD) GB/T 23296.1-2009 Food Contact Materials - Restricted Substances in Plastics - Specific Migration Tests and Content Determination Methods for Substances in Plastics to Food and Food Simulants - Guidelines for Selecting Exposure Conditions for Food Simulants -3 Principles -2- (N.N-dimethylamino) ethanol in food simulants is adsorbed by a strong cation exchange solid-phase extraction column and eluted with triethylamine, Separate from the internal standard diethylaminoethanol and other components in the chromatographic column, detect with a hydrogen flame ionization detector, and quantify using the internal standard method. Unless otherwise specified, water shall be Grade 1 water as specified in GB/T 6682, and all reagents shall be analytical pure. 4.1 2- (N.N-dimethylamino) ethanol (DMAE) standard: purity greater than 99.0%. 4.2 Diethylaminoethanol (DEAE) standard; Purity greater than 99.0%. 4.3 Glacial acetic acid. 4.4 Anhydrous ethanol. 4.5 Olive oil. 4.6 Methanol: Chromatically pure. 4.7 Isopropanol: Chromatically pure. 4.8r pentane: purity greater than 95%. 4.9 Triethylamine; Purity greater than 99%. 4.103% (mass concentration) acetic acid solution: Weigh 30 g (accurate to 0.1 g) of glacial acetic acid (4.3) into a 1L volumetric flask and bring to volume with water. 4.1110% (volume fraction) ethanol solution; Measure 100 mL of anhydrous ethanol (4.4) into a 1L volumetric flask and bring to volume with water. 4.125% (volume fraction) methanol solution of triethylamine: Measure 2.5 mL of triethylamine (4.9) into a 50 mL volumetric flask and bring to volume with methanol

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