溴菌腈在香蕉和土壤中的残留及消解动态  

Residue and Degradation Study of Bromothalonil in Banana and Soil

作　　者：罗正刚[1,2] 陈歆[3,2] 彭黎旭[3,2] 

机构地区：[1]海南大学环境与植物保护学院,海南儋州571737 [2]中国热带农业科学院环境与植物保护所,海南儋州571737 [3]中国热带农业科学院南亚热带作物研究所,广东湛江524091

出　　处：《热带农业科学》2011年第5期69-72,共4页Chinese Journal of Tropical Agriculture

基　　金：中央级公益性科研院所基本科研业务费专项资金(sscri200903;2011hzs1J001);海南省自然科学基金(809026);中国热带农业科学院环植所博士启动经费(Hzs1007)资助

摘　　要：采用气相色谱-电子捕获检测器(GC-ECD)测定了溴菌腈在香蕉和土壤中的消解动态和最终残留。香蕉和土壤样品用乙腈提取,液液分配净化,GC-ECD检测,外标法定量。溴菌腈在香蕉和土壤中的半衰期在2009年和2010年分别为1.8 d和1.9 d,施药后14 d,溴菌腈在香蕉和土壤中的消解率均达到90%以上;溴菌腈在香蕉全果和土壤中的最终残留量均低于0.07 mg/kg。结果表明:溴菌腈在香蕉和土壤中的半衰期短,消解速度快。Gas chromatography equipped with an electron-capture detector（GC-ECD） was conducted to reveal the residue dynamics and final residues of bromothalonil in banana and soil.Banana and soil samples were extracted with acetonitrile,purified by liquid-liquid separation,detected by GC with ECD,quantified by external standard method.The results revealed that the recovery ranged form 80%~100% for banana,91%~105% for soil with the relative standard deviations of 1.8%~4.8% and 1.8%~4.4% respectively.The limit of detection（LOD） of the method was 8×10-9 g.The limit of quantification（LOQ） was 0.02 mg·kg-1 for banana.The half-life of bromothalonil was 1.8 d in banana,1.9 d in soil in 2009 and in 2010,Bromothalonil decomposed more than 90% in banana and in soil after sprayed for 14 d.

关 键 词：溴菌腈 香蕉 土壤 残留分析 消解动态 

分 类 号：X592[环境科学与工程—环境工程]