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丁硫克百威对水中食蚊鱼的毒性及其降解产物克百威的动态变化

DOI: 10.11654/jaes.2013.09.009, PP. 1764-1770

Keywords: 丁硫克百威,动态变化,食蚊鱼,毒性

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Abstract:

采用固相萃取高效液相色谱柱后衍生荧光检测器检测法,检测了水中克百威的动态变化,比较了90%丁硫克百威原药和20%丁硫克百威乳油制剂的一种主要代谢产物的动态变化及其对野生食蚊鱼的毒性。结果表明:添加90%丁硫克百威原药的水中,有效成分浓度分别为0.1、0.2、0.6、1.2、1.8mg·L-1时,96h后水中克百威浓度分别为0.018、0.037、0.114、0.189、0.244mg·L-1,此时测得其对水中食蚊鱼LC50为0.079mg·L-1;添加20%丁硫克百威乳油制剂的水中,有效成分浓度分别为0.1、0.2、0.6、1.2、1.8mg·L-1时,96h后水中克百威的浓度分别为0.020、0.040、0.122、0.215、0.276mg·L-1,此时测得其对水中食蚊鱼LC50为0.047mg·L-1。实际测得的丁硫克百威对水中食蚊鱼的毒性已演变成丁硫克百威和其降解产物的联合毒性,20%丁硫克百威的乳油制剂在水中代谢能力及其对水中食蚊鱼的毒性均高于90%丁硫克百威原药。

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