水中百菌清的气相色谱测定法  

Determination of Chlorothalonil in Water by Gas Chromatography

作　　者：刘艳[1] 王玫[1] 黄春燕[1] 

机构地区：[1]南昌航空大学环境与化学工程学院,江西南昌330063

出　　处：《环境与健康杂志》2010年第6期524-525,共2页Journal of Environment and Health

基　　金：南昌航空大学基础研究项目(ZC200802150)

摘　　要：目的建立水源水、饮用水中百菌清的气相色谱的分析方法。方法采用石油醚作为萃取,水样经液液萃取、浓硫酸净化。以毛细管柱气相色谱法进行检测。结果在0.01～0.08μg/ml线性范围内,所得百菌清的回归方程为y=(-23.602097)+18785.181196x,相关系数为0.996。该方法检出限为0.12μg/L,最低检测下限浓度为0.28μg/L,低于GB5749—2006《生活饮用水标准检验方法农药指标》中百菌清最低检测浓度(0.4μg/L)。该方法的平均回收率为91.2%～110.0%,RSD为2.8%～3.0%。结论该方法具有操作简单、准确、灵敏、重现性好的优点,适用于水源水、饮用水中百菌清的测定。Objective To develop a method for the determination of chlorothalonil in source water and drinking water by gas chromatography. Methods The water samples were liquid-liquid extracted with petroleum ether and cleaned by concentrated sulfuric acid, and detected with Elite-5 capillary chromatic pillar by gas chromatography. Results Regression equation was y= （-23.602 097）＋18 785.181 196 x within linear range of 0.01-0.08 μg/ml, coefficient was 0.996. The limit of detection of the method was 0.12 p,g/L, minimum detectable concentration was 0.28 p,g/L which was lower than minimum detectable concentration of chlorothalonil （0.4 μg/L） required by GB/T 5750.9-2006 Standard Examination Methods for Drinking Water-Pesticides parameters. The average recovery rates of the method were 70%-85% with RSDs of 2.8%-3.0%. Conclusion The experiments show that the presented method is simple, accurate, sensitive and applicable to the determination of chlorothalonil in source water and drinking water.

关 键 词：水 百菌清 色谱法 气相 

分 类 号：O657.7[理学—分析化学]