水体中溴氰菊酯残留检测方法及其降解规律的研究  

Research on determination method of deltamethrin residues in water and its degradation regulation

作　　者：葛筱琴[1] 高钰一[1] 沈美芳[1] 吴光红[1] 耿雪冰[1] 宋红波[1] 

机构地区：[1]江苏省淡水水产研究所,江苏南京210017

出　　处：《水产养殖》2007年第5期1-4,共4页Journal of Aquaculture

基　　金：江苏省社会发展计划项目(BS2006083)

摘　　要：本文对水体中溴氰菊酯残留的检测方法及不同条件下(曝气水体、不曝气水体、河蟹养殖水体)溴氰菊酯的降解规律进行了研究。结果表明:水体中溴氰菊酯用石油醚萃取脱水后直接GC-ECD检测,回收率达到80%～110%,前处理方法简单,方法的最低检出限为0.1μg/L,方法准确可靠,适合水体中溴氰菊酯农药残留的检测;配制的1ng/mL、10ng/mL、50ng/mL三种浓度的溴氰菊酯水溶液,在曝气的条件下24h降解了44.2%～72.4%,在静置的条件下24h降解了7.5%～26.2%,溴氰菊酯浓度越高降解得越快;在养殖河蟹的水体中同样高浓度比低浓度溴氰菊酯降解快。In the article, determination method of dehamethrin residues in water and degradation regulation of dehamethrin in different conditions were researched. Results showed it＇s a simple method that after extracted by petrol ether and dehydrated, deltamethfin was determined by GC-ECD with the recoveries of 80%-110% and the detection limit of 0.1ug/L, The method is sensitive and suitable for the determination of deltamethrin in water. When the concentration was 11 ng/mL, 10 ng/mL and 50 ng/ mL, deltamethrin had degraded 44.2%-72,4% in continuous aeration water after 24 h while the degradation ratio was 7.5%-26.2% in static condition. High concentration of deltamethrin degraded faster than low concentration and the same as the water which feed crabs.

关 键 词：水体 溴氰菊酯 残留 降解规律 

分 类 号：S481.8[农业科学—农药学]