摘要
建立了反相条件下茚虫威在对映体水平上的液相色谱-串联质谱(LC-MS/MS)残留分析方法。采用基质匹配标准品的外标法定量,比较分析了基质分散萃取与固相萃取2种净化方法中基质效应的影响。番茄和葡萄样品均采用乙腈提取,NH2/Carb复合固相萃取小柱净化;水样直接采用C18-H固相萃取小柱富集净化。手性拆分的色谱条件为:Chiralpak AD-RH手性分离柱,以V(乙腈)∶V(水)=65∶35为流动相,柱温25℃,流速0.4 mL/min。结果表明:在0.005~0.5 mg/kg(水样为mg/L)添加水平范围内,茚虫威对映体在3种基质中的回收率在65.5%~117.0%之间,相对标准偏差(RSD,n=5)为4.1%~18.1%。对映体的检出限(LOD)为1.4~4.3μg/kg(μg/L),定量限(LOQ)为4.7~14.2μg/kg(μg/L)。方法操作简便,结果稳定可靠,可用于茚虫威对映体在番茄、葡萄和水样品中残留的分析。
A reversed-phase chiral method for the determination of indoxacarb enantiomers was established using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The target analytes were quantified by external standard method, and the difference in matrix effect between matrix dispersed extraction and solid phase extraction was compared. The tomato and grape samples were extracted by acetonitrile and then purified by NH2/Carb solid phase extraction (SPE), while water was
出处
《农药学学报》
CAS
CSCD
北大核心
2012年第5期539-544,共6页
Chinese Journal of Pesticide Science
基金
国家自然科学基金(NSFC
31071706)资助项目