液-液萃取-气相色谱质谱法测定地表水中邻甲苯胺

摘要

建立了液液萃取-气相色谱质谱法测定地表水中邻甲苯胺的检测方法.本方法采用二氯乙烷为萃取剂,以HP-5MS色谱柱进行分离,质谱检测器检测水中邻甲苯胺的含量.邻甲苯胺的方法检出限为0.02μg·L-1,加标回收率在90.6％ ～ 96.9％间,6次测定结果的相对标准偏差小于2％.本方法分离效果好,检出限低,精密度和准确度高,测定结果令人满意,可用于地表水中邻甲苯胺的分析.%Liquid-liquid extraction-gas chromatography mass spectrometry is established to determination of o-toluidine in surface water.This method uses the dichloroethane as the extractant,HP-5 ms chromatographic column separation,mass spectrometry detector to detect the water content of o-toluidine.O-toluidine method detection limit is 0.02μg·L-1,standard addition recovery is between 90.6％～96.9％,six times the determination results,the relative standard deviation less than 2％.This method is good separation effect,low detection limit,high precision and accuracy,and the determination results satisfactory,can be used in the analysis of o-toluidine in surface water.