动物性食品中持久性有机氯农药的残留分析

Analysis on Persistent Organochlorine Pesticide Multiresidues in Animal Origin Foods

目的了解动物性食品中持久性有机氯农药的残留状况,为国家履行斯德哥尔摩公约提供背景资料。方法在全国13个不同地区随机采集市售的肉、蛋、奶、水产等样品,依照国标方法GB/T5009.19—2008的要求,采用丙酮振荡提取,石油醚液液萃取,凝胶渗透色谱法净化,以电子捕获检测器的气相色谱法进行六六六、滴滴涕、艾氏剂、氯丹、狄氏剂、异狄氏剂、七氯、六氯苯和灭蚁灵共9种持久性有机氯农药20个组分的检测。结果在检测的猪肉、牛肉、羊肉、鸡肉、鱼肉、鸡蛋、牛奶等食品样品中,9种持久性有机氯农药均为痕量检出,其中仅有β-六六六、pp′-DDE、六氯苯和七氯检测残留量大于3倍检出限,其他组分残留量则为检出限水平。结论随着六六六、滴滴涕等持久性有机氯农药的禁用或严格限用,我国动物性食品中持久性有机氯农药的残留水平明显降低。

Objective To study mutiresidual level of persistent organochlorine pesticides in animal origin foods,to provide information on the evaluation of the effectiveness of Stockholm Convention in the reduction or elimination of the release of POPs into the environment in China.Method Pork,beef,mutton,chicken,fishes,egg and milk were collected at random from markets in 13 cities.The methodology used for the analysis of OCPs was based on acetonepetroleum ether extraction,gel permeation chromatography（GPC） cleanup,and gas chromatography with electron capture detector according to GB /T 5009.19—2008.Nines organochlorine pesticides（20 compounds） including hexachlorocyclohexanes（HCH）,dichlorodiphenyl trichloroethane（DDT）,aldrin,chlordane,dieldrin,endrin,heptachlor,hexachlorobenzene（HCB） and mirex were determined.Results The residual level of nines persistent organochlorine pesticides in animal origin foods were low.Only β-HCH、pp＇-DDE、HCB and heptachlor were detected over 3 times of the limit of detection（LOD） and other compounds were all near LOD.Conclusion The residual level of persistent organochlorine pesticides in animal origin foods dramatically decreased with the various bans and restrictions on HCHs,DDTs and other organochlorine persistent pesticides usage in China.