CGC-FPD测定生活饮用水中痕量有机磷农药的研究  

Determination of trace organophosphorus pesticide in drinking water by CGC-FPD

作　　者：刘兰侠[1] 张燕[1] 陈翔[1] 倪蓉[1] 

机构地区：[1]上海市徐汇区疾病预防控制中心,上海200237

出　　处：《中国卫生检验杂志》2014年第5期644-646,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的建立以毛细管气相色谱法测定生活饮用水中痕量有机磷农药残留。方法采用2次液液萃取,氮吹浓缩后,以毛细管柱气相色谱法-火焰光度检测器(CGC/FPD)定性,外标法定量分析测定了生活饮用水中的7种痕量有机磷农药残留。结果研究了7种有机磷农药的气相色谱法(CGC-FPD)的分析条件;结果表明,以二氯甲烷为萃取剂,在0.04μg/ml^2.00μg/ml线性范围内,线性系数r大于0.999,平均加标回收率的范围为72.8%~111.3%,其相对标准偏差(RSD)为1.429%~5.894%,方法的最低检测限为0.25μg/L^2.50μg/L(以100 ml水样计)。结论建立2次溶液萃取,毛细管柱气相色谱法-火焰光度检测器(CGC/FPD)测定生活饮用水中的有机磷农药残留,选择性好,回收率高,定量分析结果准确。Objective To establish a method for determination of trace organophosphorus pesticides in drinking water using GC - FPD with capillary column. Methods Seven kinds of organophosphorus pesticides residues in drinking water were extracted twice with chloride and blowed nitrogen concentration, then qualitatively analyzed by capillary column gas chromatography - flame photometric detector （ CGC/FPD）, and quantitatively analyzed by external standard method. Results With dichloromethane as extraction agent, the standard calibration curves were linear over the concentration range of 0. 04 μg/ml - 2.00 μg/ml（r2 〉 0. 999 ）. The mean recoveries and RSDs of organophosphorous pesticides were 72.8% - 111.3% and 1. 429% - 5. 894%, respectively. The method detection limit was 0. 25μg/L - 2.50 μg/L. Conclusion Based on twice extraction, this method has good selectivity, high recovery rate and accurate quantitative analysis results in determination of organophosphorous pesticide residues in drinking water.

关 键 词：两次萃取 有机磷农药 毛细管柱气相色谱 

分 类 号：O657.71[理学—分析化学]