摘要
采用电子捕获检测器气相色谱(GC-ECD)研究了产自中国(北京、上海、天津、广州、石家庄)、法国和西班牙20种酸奶中有机氯杀虫剂(OCPs)和多氯联苯(PCBs)的残留水平与残留特征,并对残留特征的成因进行了分析。结果显示,六六六(HCHs)和滴滴涕(DDTs)仍是酸奶中OCPs的主要来源,虽无一超标,但100%检出。其中β-HCH和p,p-DDE分别是HCHs 和DDTs的特征残留单体。同时,5CBs和6CBs对∑PCBs残留的贡献最大,PCB202、103和128是所分析目标PCBs的主要来源,而4,4- 和2,3,5- 氯取代方式是PCBs在牛奶中的特征残留形式。
The residues of organochlorine pesticides(OCPs)and polychlorinated biphenyls (PCBs) in 20 different yogurtspecimens of 16 brands from China(Beijing, Tianjin, Shanghai, Guangzhou, Shijiazhuang), Spain and France were determined byGas Chromatography-Electron Capture Detector (GC-ECD). The sources of the characteristic residues of HCHs, DDTs andPCBs in yogurt were explained. The results indicated that all the yogurt samples contained the residues of HCHs and DDTs, whichwere still the main contributors to OCPs in yogurt samples. The β-HCH and p,p-DDE were the characteristic residues isomerof HCHs and DDTs in yogurt, respectively. Furthermore, the main contributors of ∑PCBs were the sum of the 5CBs and6CBs, and the PCB202. Also, the 4,4- and 2,3,5- substitution patterns were the characteristic residues of PCBs in yogurt.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2004年第9期162-165,共4页
Food Science
基金
国家自然科学基金资助重大项目和面上项目(10275074)
中国科学院创新项目(KJCX-N01)
国际原子能机构资助项目(IAEA Contract No.11921)
深圳市科技三项经费资助项目(200209)
关键词
酸奶
有机氯污染物
残留特征
成因分析
电子捕获检测器
气相色谱
多氯联苯
gas chromatography-electron capture detector (GC-ECD)
yogurt
organochlorine pesticides (OCPs)
polychlorinated biphenyls (PCBs)
