分散液液微萃取在酸性模拟体系中塑料包装材料PAEs的溶出应用

将分散液液微萃取(DLLME)与气相色谱-氢火焰离子化检测器(GC-FID)技术相结合,建立了一种简单快速测定塑料包装材料在酸性模拟体系(体积分数为3%乙酸水溶液)中6种邻苯二甲酸酯(PAEs)溶出量的方法.采用四氯化碳作萃取荆,乙腈为分散剂,在优化条件下,6种PAEs在1.0～100.0μg/L质量浓度内呈良好的线性...

Application of Dispersive Liquid-liquid Microextraction to Dissolution of PAEs in Plastic Packaging Materials Under Acid Simulation System

A effective,rapid,simple and convenient method,dispersive liquid-liquid microextraction(DLLME) combination gas chromatography coupled with flame ionization detector(GC-FID),was used for the determination of six phthalate esters(PAEs) in plastic packaging materials which was soaked in acid simulation system(3% acetic acid liquid).Under the optimum extraction conditions(carbon tetrachloride as extraction solvent,acetonitrile as dispersive solvent),a good linear relationship was obtained in the range of 1.0-100.0 μg/L,the correlation coefficients was 0.999 8-0.999 9 and the limits of detection was between 1.5-15 μg/kg(S/N=3).The PAEs in plastic packaging materials were successfully analyzed by using the proposed method under acid simulative system condition.The influencing factors of dissolving PAEs from plastic packaging materials,such as storage time,heating temperature,heating time and microwave heating,were researched.The recoveries,which had been spiked with different levels,fell in the range of 72.9%-113.7% and the relative standard deviations were between 1.9% and 12.6%.