QuEChERS–气相色谱法测定地表水中氯丹和硫丹  

Determination of endosulfan and chlordane in surface water by gas chromatography with QuEChERS coupled

作　　者：刘小波 王乐力 LIU Xiaobo;WANG Leli(No.203 research Institute of China Nuclear Industry Corporation,Xianyang 712000,China)

机构地区：[1]中国核工业集团公司第二〇三研究所

出　　处：《化学分析计量》2019年第6期78-81,共4页Chemical Analysis And Meterage

摘　　要：建立了QuEChERS法结合气相色谱检测地表水样中氯丹和硫丹的分析方法。选择环己烷作为提取液,QuEChERS净化,从线性、检出限、定量限和精密度等方面考察了方法的性能。4种有机氯化合物的质量浓度在5~200μg/L范围内与色谱峰面积呈良好的线性关系,相关系数均不低于0.999,方法检出限为0.04~0.09μg/L,样品加标回收率为90.0%~93.2%,测定结果的相对标准偏差为3.61%~5.88%(n=6)。实际样品加标回收结果优于固相萃取法。该方法操作简便,缩短了分析时间,结果准确、可靠,有机溶剂用量少,适用于水中氯丹和硫丹的测定。A new method has been developed and validated for the simultaneous analysis of endosulfan and chlordane in surface water samples at trace levels by gas chromatography with QuEChERS combined.Water samples were extracted by cyclohexane and purified by QuEChERS,and then analyzed by gas chromatography.The performance of the method was investigated in terms of linearity,detection limit,quantitative limit and precision.The result showed that the calibration curves were linear in the range of 5-200μg/L for target compounds,with correlation coefficients all above 0.999.The detection limits were 0.04-0.09μg/L.Meanwhile,the average recoveries ranged from 90.0%to 93.2%,and the RSDs were 3.61%-5.88%(n=6).In addition,the recovery of results of actual samples with standard addition experiment were better than SPE.This method is suitable for the determination of endosulfan and chlordane in surface water due to its easy operation,shorter analysis time,less solvent dosage and reliable detection results.

关 键 词：氯丹 硫丹 QUECHERS 气相色谱 地表水 

分 类 号：O657.7[理学—分析化学]