80%胺鲜酯·甲哌鎓在棉花和土壤中的残留及消解动态  

Residues and degradations of DA-6 and mepiquat(MQ) in cotton and soil

作　　者：李敏敏[1,2] 刘新刚[2] 董丰收[2] 徐军[2] 郑永权[2] 

机构地区：[1]东北农业大学,哈尔滨150030 [2]农业部农药化学与应用重点开放实验室,中国农业科学院植物保护研究所,北京100193

出　　处：《环境化学》2013年第2期289-294,共6页Environmental Chemistry

基　　金：公益性行业(农业)科研专项(200903033)资助

摘　　要：采用超高效液相色谱-串联质谱法测定胺鲜酯与甲哌鎓在棉花和土壤中的残留.胺鲜酯与甲哌鎓在棉叶中的平均回收率为86.9%—115.4%,变异系数为2.2%—11.3%;棉籽中胺鲜酯与甲哌鎓的平均回收率为76.3%—98.4%,变异系数为3.1%—9.8%;在土壤中的平均回收率为81.3%—108.2%,变异系数为2.7%—8.4%;胺鲜酯与甲哌鎓在棉花和土壤中的消解动态以及最终残留结果表明,在山东和河南省两地,胺鲜酯与甲哌鎓在棉叶中消解较土壤中快,在山东省棉叶及土壤中的消解半衰期分别为1.3—4.5 d和4.3—7.6 d,在河南省棉叶及土壤中的消解半衰期分别为1.3—1.9 d和4.1—6.2 d.80%胺鲜酯.甲哌鎓可溶性粉剂在棉花和土壤中最终残留量均小于0.005 mg·kg-1.A ultra-high performace liquid chromatograph-mass spectrometry（UPLC-MS/MS） method for determination of DA-6 and MQ residues in cotton and soil was studied.The results showed the average recoveries of DA-6 and MQ in cotton leaves,cotton seeds and soil were 86.9%—115.4%,76.3%—98.4% and 81.3%—108.2%,with the relative standard deviation of 2.2%—11.3%,3.1%—9.8% and 2.7%—8.4%,respectively.A field experiment was conducted to reveal dynamics of DA-6 and MQ degradation in cotton plant.The field experiment results showed that in Shandong and Henan Province,DA-6 and MQ degraded more rapidly in cotton leaves than in soil.The half-lives in cotton leaves and soil were 1.3—4.5 d and 4.3—7.6 d in Shandong Province,and 1.3—1.9 d and 4.1—6.2 d in Henan Province,respectively.The final residues of DA-6 and MQ in cotton and soil were all lower than 0.005 mg · kg-1.

关 键 词：超高效液相色谱-串联质谱 胺鲜酯 甲哌鎓 棉花 

分 类 号：X592[环境科学与工程—环境工程]