GC-MS法测定白酒接触塑料材料中非邻苯类塑化剂TXIB的迁移量

该研究采用液液萃取结合气相色谱-质谱(GC-MS)法建立了白酒接触用塑料材料中2,2,4-三甲基-1,3-戊二醇双异丁酸酯(TXIB)迁移量的测定方法.方法采用食品模拟物对常见塑料材料样品进行迁移试验后,得到模拟浸泡液,选择正己烷作为萃取溶剂对模拟浸泡液进行萃取,萃取溶剂体积为2 mL,震荡萃取时间为1 min,萃取液...

Gas Chromatography-mass Spectrometry for Analyzing TXIB Migration in Plastics in Contact with Chinese Baijiu

Liquid-liquid extraction and gas chromatography-mass spectrometry(GC-MS)was used to establish a quantitative method for measuring the leaching of 2,2,4-trimethyl-1,3-pentanediol diisobutyrate(TXIB)in plastics in contact with Chinese Baijiu.Food simulants were used to prepare a simulated soaking solution for measuring the leaching of common plastic materials.N-Hexane was used as an extraction solvent.The volume of extraction solvent was 2 mL,and the shaking extraction time was 1 min.The extract was separated by HP-5 ms(30 m×0.25 mm×0.25μm)capillary chromatography,analyzed by GC-MS with selective ion monitoring,and quantified using an external standard.The results show that this method can be used to rapidly measure the quantity of TXIB leached from plastic materials into Baijiu,which is reflected by the regression line correlation coefficient(r=0.9975),limit of quantification(0.02 mg/kg),recovery(106.60%~119.90%),and relative standard deviations(2.30%~6.50%).This method is rapid,sensitive,and accurate,and is suitable for evaluating TXIB leaching from plastics in contact with Baijiu.