关键词：聚乙烯；增塑剂；邻苯二甲酸酯；气相色谱
Abstract：Polyethylene food packaging materials containing hazardous substances plasticizer (mainly phthalate plasticizer esters) seriously endanger healthy crowd will have estrogenic effect,"three to" effect, reproductive toxicity, developmental toxicity and other toxic.The method for simultaneous determination of Plasticizer,mostly five kinds of phthalate esters,namely dimethyl phthalate,diethyl phthalate,di-n-butyl phthalate,di-n-octyl phthalate and di(2-ethylhexyl) phthalate in food-packaging bags by GC were developed.The preparation of sample have been compared.Finally,we choosed the best pretreatment method.The food-packaging bags were extracted with methanol:ethanol (1:1) immersion ultrasonic extraction and evaporation to nearly dry, with the volume of methanol to 15 mL.Processing by GC.Recoveries and relative standard deviation of the five phthalates by GC were 89.46％-110.58％ and 2.85％-4.51％, respectively.The detection limits:2.0 ng for DMP,1.8 ng for DEP,2.6 ng for DBP,3.2 ng for DOP and 3.1 ng for DEHP.The methods presented the advantages of high precision,high sensitivity, high recoveries,low consumption of sample and so on.
