GB 31604.53-2022 Translated English of Chinese Standard (GB31604.53-2022): National food safety standard - Food contact materials and articles - Determination of migration of 5-Ethylidene-2-norbornene, mixt. of endo-and exo-isomers
https://www.chinesestandard.net, 21 ago 2022 - 14 pagine
This document specifies the method for the determination of the migration of 5-Ethylidene-2-norbornene in food contact materials and products. This document applies to the determination of the migration of 5-Ethylidene-2-norbornene in plastics, rubber, and coated food contact materials and products.
0.050mL of 5-Ethylidene-2-norbornene 5-Ethylidene-2-norbornene 0.10mg/L 5-Ethylidene-2-norbornene cis 5-Ethylidene-2-norbornene standard intermediate 5mL volumetric flasks acetic acid acidic and ethanol-containing area/volume ratio blank test solution brown glass container cap and seal chemical alternative solvent chromatogram of 5-Ethylidene-2-norbornene chromatography-mass spectrometry 5-Ethylidene-2-norbornene concentration of 5-Ethylidene-2-norbornene contact with food determine test solution ethanol and isooctane ethanol by gas ethanol-containing food simulants Figure A.8 food contact materials food in actual gas chromatography-mass spectrometry Immediately cap instrument reference conditions intermediate solution 100mg/L kilograms Maintain for 3min Mass spectrometer materials and products migration test milligrams norbornene oil-containing food simulants olive oil peak area provisions of GB quantification limit Quantitative ions m/z reference conditions listed sample in contact seal for testing Selected ion chromatogram series of standard set volume simulants and chemical solution of acidic solution of oil-containing specimen solution spectrometry 5-Ethylidene-2-norbornene trans standard curve standard intermediate solution standard stock standard working solution Tetrahydrofuran Transfer the solution volume fraction