Li Xiaojing, Gan Pingsheng, Peng Rongfei, Huang Cong, Yu Hong
Guangzhou Center for Disease Control and Prevention, 510080 Guangdong, People's Republic of China.
J Chromatogr Sci. 2010 Mar;48(3):183-7. doi: 10.1093/chromsci/48.3.183.
Determination of 23 organophosphorous pesticides (sulfotep, phorate, demeton, diazinon, disulfoton, kitazzin.P, chlorpyrifos-methyl, methyl-parathion, ronnel, fenitrothion, malathion, chlorpyrifos, fenthion, parathion, bromophos, isofenphos-methyl, phenthoate, quinalphos, ethion, triazophos, carbophenothion, pirimiphos-methyl, and pirimiphos-ethyl) in water using solid-phase microextraction (SPME) with gas chromatography-mass spectrometry detection (GC-MS) was investigated. The influence of various parameters on pesticides extraction efficiency by SPME was thoroughly studied. For quantitation in the selective ion monitoring (SIM) mode, the linear range of most compounds was found to be between 0.05-10 microg/L, and the detection limits were between 0.7-50 ng/L. To validate matrix effects for surface water, the recoveries were calculated between 71-104%. SPME in combination with GC-MS is a sensitive and effective method for the determination of organophosphorous pesticides (OPPs) in water samples.
采用固相微萃取（SPME）结合气相色谱 - 质谱检测（GC - MS）法测定水中23种有机磷农药（治螟磷、甲拌磷、内吸磷、二嗪农、乙拌磷、嘧啶磷、甲基毒死蜱、甲基对硫磷、杀螟松、杀螟硫磷、马拉硫磷、毒死蜱、倍硫磷、对硫磷、溴硫磷、甲基异柳磷、稻丰散、喹硫磷、乙硫磷、三唑磷、蔬果磷、甲基嘧啶磷和乙基嘧啶磷）。深入研究了各种参数对SPME萃取农药效率的影响。在选择离子监测（SIM）模式下进行定量分析时，大多数化合物的线性范围为0.05 - 10 μg/L，检测限为0.7 - 50 ng/L。为验证地表水的基质效应，计算回收率在71% - 104%之间。SPME与GC - MS联用是测定水样中有机磷农药（OPPs）的一种灵敏且有效的方法。
