摘要
建立了利用固相萃取-气相色谱（SPE-GC）测定水体中胺鲜酯残留量的方法。考查了3种不同固相萃取柱（C18、florisil、Oasis^R HLB）对水溶性农药胺鲜酯的吸附效果,发现它们对水中胺鲜酯的萃取效率依次为8%、13%和96%;进一步研究了利用Oasis^RHLB萃取水中胺鲜酯的最佳条件（洗脱剂二氯甲烷用量4-8 mL）,Oasis^RHLB（60 mg）小柱对胺鲜酯的保留容量高达200μg.柱^-1。运用该方法测定胺鲜酯光解试验样品,结果表明胺鲜酯质量浓度的对数与光照时间呈良好的线性关系。胺鲜酯在氙灯下的光化学降解符合一级动力学反应,光解半衰期为82 m in,较易光解。
A method has been developed for monitoring DA - 6 in water using the solid phase extraction （SPE） method combined with gas chromatography. Three different SPE cartridges（ C18, florisil and Oasisa HLB）were tested in extracting DA -6, showing a recovery rate of 8%, 13% and 96%, respectively. The solid phase extraction method using an Oasisa HLB cartridge was further studied for its optimal operating conditions, which were found to be 4 - 8 mL dichloromethane as eluting solvent; the reserved capacity of an Oasisa HLB cartridge （60 mg） reaches as high as 200 μg· cartridge^-1. This method was applied to a photochemical degradation test of DA -6, with results showing that the photolysis of DA- 6 in water followed the first order reaction, and its half-life was 82 min under xenon lamp.
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2007年第4期45-48,共4页
Journal of Ecology and Rural Environment
基金
国家重点基础研究发展规划项目(2002CB410805)
关键词
固相萃取
气相色谱
胺鲜酯
光解
solid phase extraction （ SPE ）
gas chromatography
hexanoic acid 2 - （ diethyl amino ） ethylester （ DA - 6）
photolysis
