引用本文:武法伟,董淑娟,刘梦.LLE-GC-MS法测定水中27种有机农药[J].环境监控与预警,2017,9(3):35-40
WU Fa wei, DONG Shu juan, LIU Meng.Study on The 27 Kinds of Organic Pesticides in Water by LLE GC MS[J].Environmental Monitoring and Forewarning,2017,9(3):35-40
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LLE-GC-MS法测定水中27种有机农药
武法伟,董淑娟,刘梦1,2
1. 山东省地矿工程勘察院,山东 济南 250014;2. 中国石油大学(北京),重质油国家重点实验室,北京 102249
摘要:
建立了同时测定水中27种有机农药的LLE-GC-MS法。该法前处理前需调节水样pH值<2,不加甲醇作为改性剂,以1:1(V/V)正己烷-石油醚为萃取溶剂进行液液萃取,GC-MS法进行检测。方法在各目标化合物质量浓度0.010~0.500 mg/L范围内线性良好,相关系数R2均>0.995,检出限为0.021 ~ 0.250 μg/L,加标回收率为73.6% ~ 113.6%,相对标准偏差RSD为4.0% ~ 14.1%,适用于水中27种有机农药的检测。
关键词:  液液萃取  气相色谱质谱法  水中  有机农药
DOI:
分类号:X832;0657.7+1
文献标识码:B
基金项目:山东省地质勘查项目(SSDZS-2015-GTT01)
Study on The 27 Kinds of Organic Pesticides in Water by LLE GC MS
WU Fawei, DONG Shujuan, LIU Meng1,2
1. Shandong Geological Engineering Investigation Institute, Jinan,Shandong 250014, China;2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Abstract:
A new method was established for simultaneous determination of 27 kinds of pesticide residues in water by using liquid liquid extraction (LLE). Firstly, we need to adjust the pH value of the water less than two(pH<2), hexane and petroleum ether mixture (V/V= 1:1) was used as extraction solvent to extract 27 kinds of pesticide residues, and then determinationed by gas chromatography mass spectrometry (GC MS). In this method, the linear relationship of each target compound is good in the range of 0.010~0.500 mg/L, the correlation coefficients were greater than 0.995, and the detection limits ranged from 0.021 to 0.250 μg/L, the average recovery was among 73.6% to 113.6% with the relative standard deviation varied between 4.0% and 14.1%. The method is applicable to detection of pesticide residues in water.
Key words:  Liquid liquid extraction (LLE)  GC MS  Water  Organic pesticides