毛细管胶束电动色谱法检测4种有机磷农药  

DETERMINATION OF FOUR KINDS OF ORGANOPHOSPHATE PESTICIDES BY MICELLAR ELECTROKINETIC CAPILLARY ELECTROPHORESIS

作　　者：王文雷[1] 赵明辉[2] 袁伟栋[1] 

机构地区：[1]山东省环境监测中心站,济南250013 [2]山东大学化学与化工学院,济南250100

出　　处：《化学分析计量》2005年第5期21-23,共3页Chemical Analysis And Meterage

摘　　要：用毛细管胶束电动色谱电化学检测的方法对对氧磷、甲基对硫磷、乙基对硫磷、扑灭松等4种常见有机磷农药进行分离检测.使用30 cm×20μm i.d.的石英毛细管,当分离电压为12 kV,工作电极电势为-0.6V,在pH值为5.0的20mmol/L乙酸-乙酸钠缓冲液与20 mmol/L十二烷基硫酸钠溶液中,对氧磷、甲基对硫磷、乙基对硫磷、扑灭松4种组分在11min内得到基线分离,检出限分别为0.086、0.64、0.67、3.4pg.将该方法用于地表水样品的检测,加标回收率为94%～102%.A method was developed to separate and determine paraoxon, methyl parathion, ethyl parathion and fenitrothion bv micellar electrokinetic capillary, electrophoresis with electrochemical detection. The experiment results showed that the investigated compounds can be successfully separated within 1 l min by using quartz capilllary tube （37 cm × 20 μm i. d. ） , with 20 mmol/L acetic acid-sodium acetate - 20 mmol/L sodium dodecyl sulfate as buffer solution, detection eleetrode potential of - 0.6 V and separation voltage of 12 kV. The limits of detection（LODS） for the four kinds of pesticides were 0. 086, 0.64, 0.67, 3.4 pg respectively. This method was successfully applied to the analysis of pesticides in surface water sample, the recoveries of four kinds of pestieides were in the range of 94% - 102%.

关 键 词：毛细管胶束电动色谱 电化学检测 有机磷农药 电动色谱法 甲基对硫磷 石英毛细管 硫酸钠溶液 加标回收率 分离检测 分离电压 

分 类 号：O657.1[理学—分析化学] TQ241.13[理学—化学]