关键词：
液液微萃取;苯二甲酸酯;效液相色谱;食品模拟体系
摘 要：
建立了离子液体分散液液微萃取与高效液相色谱联用技术检测液体食品体系中邻苯二甲酸酯类增塑剂(Phthalic acid esters,PAEs)的方法。分别以蒸馏水、3%乙酸水溶液和10%乙醇水溶液作为水性食品、酸性食品和醇类食品的模拟体系。选用离子液体1-丁基-3-甲基咪唑六氟磷酸盐(1-butyl-3-methylimidazolium hexafluorophosphate,[BMIM][PF6])为萃取剂,甲醇为分散剂,对样品中的PAEs进行萃取。以萃取相中邻苯二甲酸二丁酯(Dibutyl phthalate,DBP)的浓度为优化指标,分别得到各类食品模拟体系的最佳萃取剂体积、分散剂体积、萃取时间和离心时间。采用所建立的方法对模拟体系进行加标回收实验,三种模拟体系在加标量为0.02 mg时的加标回收率在79%~112%之间,相对标准偏差(RSD)在2%~6%之间。表明所建立的方法可靠,可用于液体食品中PAEs残留的检测。
译 名：
Analysis of phthalates in liquid food by ionic liquid dispersive liquid- liquid microextraction- high performance liquid chromatography
作 者：
HU Die;WANG Zhao-mei;WU Shu-ting;HUANG Shu-qing;College of Light Industry and Food Sciences,South China University of Technology;
关键词：
liquid-liquid microextraction;;phthalates;;HPLC;;food simulation system
摘 要：
A method for the detection of PAEs contaminant in liquid food simulation system by using ionic liquid dispersive liquid- liquid microextraction in combination with the high performance liquid chromatography was established.The distilled water,3% acetic acid aqueous solution and 10% aqueous ethanol were adopted as the simulation systems representing for aqueous,acidic and alcohol containing food respectively. The ionic liquid1- butyl-3- methylimidazolium hexafluorophosphate( [BMIM][PF6]) was used as extracting agent and methanol as dispersive agent to extract the PAEs in the samples. With the final concentration of dibutyl phthalate( DBP) as goal,the extraction conditions including the volume of the extraction solvent,the volume of the dispersing agent,the extraction time and the centrifugation time were optimized. A standard addition recovery experiment was conducted with the mentioned three simulation food system. The recovery rate was between 79% ~ 112% and the relative standard deviation between 2% ~ 6% with 0.02 mg of standard PAEs addition. The established methods were proved accurate and reliable,which can be used for the detection of PAEs residues in liquid food.
