气相色谱法-氮磷检测器检测污水处理厂进出水中有机磷农药残留  

Detection of organic phoshporus pesticides residues in influent and effluent water of sewage treatment plant by gas chromatography with nitrogen-phosphorus detector.

作　　者：邵永怡[1] 

机构地区：[1]北京城市排水集团水质检测中心,北京100124

出　　处：《分析仪器》2009年第1期20-24,共5页Analytical Instrumentation

摘　　要：采用固相萃取全自动工作仪和Triazine前处理柱对污水处理厂的进、出水样进行前处理,用气相色谱法氮磷检测器检测污水中测乐果、甲基对硫磷、马拉硫磷和对硫磷4种有机磷农药残留。研究了在不同铷珠电流值条件下氮磷检测器对4种有机磷农药的响应值。本法对乐果、甲基对硫磷和马拉硫磷的检出限为0.03ng/μL,对硫磷为0.005ng/μL,线性范围均为3～500ng/mL,加标回收率为79%～115%。试验结果证明,可以采用较大直径的毛细管柱进行污水中有机磷农药的测定。A method was developed for the detection of 4 kinds of organic phosphorus pesticides residues in the influent and effluent water samples of sewage treatment plant. The samples were treated by Triazine solid phase extraction pretreatment column and the organic phosphorus pesticides residues were determined by gas chromatography with nitrogen-phosphorus detector. The response of the detector with Rb bead of different current was studied. The detection limits were 0. 003 ng/μL for dimethoate, methyl parathion and malathion and 0. 005ng/μL for parathion. The linearities were in the range of 3-500 ng/mL and the re- coveries were 84.6%-115% for all four pesticides. The results show that the capillary column with larger diameter can be used for the detection of organic phosphorus pesticides residues in waste water.

关 键 词：气相色谱法 氮磷检测器 污水有机磷农药 乐果 甲基对硫磷 马拉硫磷 对硫磷 

分 类 号：TH833[机械工程—仪器科学与技术]