食品包装材料聚乙烯中有害物质的检测方法研究

范文编号:ZY017    范文字数:13363,页数:23

摘要：食品包装材料聚乙烯中含有的有害物质增塑剂（主要是邻苯二甲酸酯类增塑剂）严重危害着人群的健康，会产生类雌激素效应，“三致”效应，生殖毒性、发育毒性以及其它毒性。用气相色谱测定食品包装材料聚乙烯中增塑剂，主要是5种邻苯二甲酸酯类化合物（邻苯二甲酸二甲酯（DMP）、邻苯二甲酸二乙酯（DEP）、邻苯二甲酸二丁酯（DBP）、邻苯二甲酸二正辛酯（DOP）和邻苯二甲酸二（2-乙基己基）酯（DEHP））。样品用甲醇：乙醇（1：1）浸泡，超声提取，蒸发浓缩至近干，用甲醇定容到15mL。进行气相色谱分析。气相色谱回收率为89.46％-110.58％，精密度RSD为2.85％-4.51％，检出限DMP、DEP、DBP、DOP和DEHP分别为2.0、1.8、2.6、3.2和3.1ng，这种方法具有样品用量少，分离效果好，灵敏度、回收率高等优点。

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.

Keywords： Polyethylene;Plasticizer;Phthalic acid esters;Gas chromatography

目 录
中文摘要
英文摘要
目录
1 绪论 1
 1.1 食品包装材料聚乙烯（PE 1
 1.2 增塑剂 1
 1.3 邻苯二甲酸酯 2
 1.4 样品预处理影响因素 6
 1.5 国内外测定方法的概况 7
2 实验部分 8
 2.1 主要仪器、试剂和样品 8
 2.1.1 仪器 8
 2.1.2 试剂和样品 8
 2.2 实验准备 8
 2.3 样品预处理 8
 2.4 分离测定 9
 2.4.1 气相色谱条件 9
3 结果与讨论 10
 3.1 GC分离 10
 3.2 样品分析 11
4 总结与展望 17
 4.1 总结 17
 4.2 展望 17
致谢 18
参考文献 19

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