[Organochlorine pesticide residues in cow's milk, Nicaragua].

A L Zapata Morán, M M Santamaría Ríos, M Alvarez Irías, S Salazar Vanegas, U Müller
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Abstract

This work reports on a preliminary study carried out in Nicaragua to build a profile of the contamination of cow's milk with 10 organochlorine pesticides and make recommendations based on the findings. Between December 1993 and March 1994, milk samples were collected from 48 different sites in the country. The samples were analyzed for residues of hexachlorobenzene (HCB), alpha-BHC, lindane, aldrin, dieldrin, oxychlordane, heptachlor epoxide, and the principal metabolites of DDT (p,p'-TDE, p,p'-DDE, and p,p'-DDT) by means of solid-phase extraction from milk fat, and the quantity of the residues was determined by gas chromatography with electron capture detection. Heptachlor epoxide was found in 1 milk sample, dieldrin in 1, lindane in 3, oxychlordane in 3, alpha-BHC in 3, aldrin in 6, HCB in 9, and metabolites of DDT in 39 (81% of the samples). The six samples most heavily contaminated with by-products of DDT came from the departments of León and Chinandega, in the Pacific region, where there used to be intensive cotton production. The highest concentration was found in the sample from Malpaisillo, with 1105 micrograms of pesticide per kg of milk fat. The authors recommend that studies should be done so that the risk of contamination of other food products can be estimated, and that the public's health should be protected through strict control of the production or importation, storage, sale, and use of organochlorine pesticides.

[牛奶中的有机氯农药残留,尼加拉瓜]。
这项工作报告了在尼加拉瓜进行的一项初步研究,目的是建立牛奶受10种有机氯农药污染的概况,并根据调查结果提出建议。1993年12月至1994年3月期间,从该国48个不同地点收集了牛奶样本。采用固相萃取法对样品中六氯苯(HCB)、α -六六、林丹、艾氏、狄氏、氧氯丹、环氧七氯以及DDT的主要代谢物(p,p′-TDE、p,p′-DDE和p,p′-DDT)的残留量进行分析,并采用气相色谱-电子捕获检测法测定残留量。1份牛奶样品中检出环氧七氯,1份检出狄氏剂,3份检出林丹,3份检出氧氯丹,3份检出α -六六六,6份检出艾氏剂,9份检出六氯环己烷,39份检出滴滴涕代谢物(占样本的81%)。受滴滴涕副产品污染最严重的6个样本来自太平洋地区León和Chinandega部门,那里曾经有密集的棉花生产。在马尔派西略的样本中发现的农药浓度最高,每公斤乳脂含有1105微克农药。作者建议,应该进行研究,以便可以估计其他食品受到污染的风险,并通过严格控制有机氯农药的生产或进口、储存、销售和使用来保护公众的健康。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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