采用固相萃取-气相色谱法测定水中唑酮草酯的残留  

Solid-phase Extraction and Gas Chromatography for Determination of Carfentrazone-ethyl Residue in Water

作　　者：董茂锋[1,2] 刘丰茂[2] 潘灿平[2] 韩丽君[2] 钱传范[2] 江树人[2] 

机构地区：[1]上海市农业科学院农产品质量标准与检测技术研究所,上海201106 [2]中国农业大学理学院,北京100193

出　　处：《农药学学报》2008年第4期460-463,共4页Chinese Journal of Pesticide Science

基　　金：农业部948项目(编号2005-Z34)资助

摘　　要：以C18固相萃取法(C18-SPE)和带有电子捕获检测器的气相色谱仪(GC-ECD)为检测手段,建立了水体中唑酮草酯的残留检测方法。通过对淋洗液体积、水样体积和水样pH值等条件的优化,确定水样体积500mL、pH7.0、淋洗液乙酸乙酯(3mL)为最佳固相萃取条件。该方法在0.1、0.5和2.0μg/L3个添加水平的回收率为81.45%～108.7%,相对标准偏差(RSD)为0.74%～1.5%,方法检出限为0.02μg/L。应用该方法对两个环境样本(自来水和河水)进行检测,均未检出唑酮草酯的残留。对自来水和河水样本进行0.5μg/L的添加回收实验,其平均回收率分别为93.8%和79.9%,RSD分别为1.3%和8.0%,表明该方法适用于水体中唑酮草酯的残留检测。The solid-phase extraction （SPE） and gas chromatography connected with electron-capture detector （GC-ECD） was used for determination of carfentrazone-ethyl residue in water. Several key parameters that influence the SPE performance were studied. The results showed that good recovery was obtained using 3 mL ethyl-acetate as the eluent and the sample volume was 500 mL at pH 7.0. The fortified recovery of carfentrazone-ethyl at concentration of 0. 1,0.5 and 2.0 μg/L was in the range of 81. 45% - 108. 7%, with the RSD of 0. 74% - 1. 5%. The limit of detection of carfentrazone-ethyl in water was 0. 02 μg/L. The established method was applied to detect two environmental water samples （tap water and river water） and the results showed that there was no detectable carfentrazone-ethyl residue in the samples. Furthermore, the fortified recovery of carfentrazone-ethyl in the tap water and river water at 0.5 μg/L was 93.8% and 79.9% ,with RSD of 1.3% and 8.0% respectively. The results showed that this method was suitable for detecting carfentrazone-ethyl in environmental water samples.

关 键 词：固相萃取 唑酮草酯 气相色谱 水 残留 

分 类 号：TQ450.263[化学工程—农药化工] O657.71[理学—分析化学]