基质固相分散-气相色谱/质谱法测定蔬菜中的邻苯二甲酸酯

Matrix Solid-Phase Dispersion and Gas Chromatography/Mass Spectrometry for the Determination of Phthalic Acid Esters in Vegetables

利用基质固相分散-气相色谱/质谱法测定了蔬菜中的邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯、邻苯二甲酸丁基苄基酯和邻苯二甲酸二异辛酯。蔬菜样品经弗罗里硅土和石墨化炭黑研磨均匀后,用乙酸乙酯淋洗净化,结果表明：上述5种邻苯二甲酸酯在0.05-10.00mg/L范围内具有良好的线性,样品的添加回收率为76%-90%,相对标准偏差为2%-7%,5种邻苯二甲酸酯的检出限为0.01-0.024m g/kg。该方法操作简便、经济,分析速度快,适用于大批量样品的分析。

A method based on matrix solid-phase dispersion （MSPD） and gas chromatography/ mass spectrometry （GC/MS） to determine dimethyl phthalate （DMP）, diethyl phthalate （ DEP ）, di-n-butyl phthalate （ DBP ）, butylbenzyl phthalate （ BBP ） and di-2-ethylhexyl phthalate （DEHP） in vegetables was developed. The method, which required Florisil as solid dispersion sorbent, graphitized carbon black as pufificant and ethyl acetate as eluting solvent, is simple, fast and suitable for the preparation of a large number of samples. The results showed that linearity of response over the five phthalic acid esters was good from 0. 05 to 10.00 mg/kg. The recoveries of spiked samples ranging from 76% to 90% and the relative standard deviations ranging from 2% to 7% were obtained. The limits of detection for the method were from 0.01 to 0. 024 mg/kg.