Rapid analysis of pesticide residues in drinking water samples by dispersive solid-phase extraction based on multiwalled carbon nanotubes and pulse glow discharge ion source ion mobility spectrometry
文献类型： 外文期刊
作者： Zou, Nan 1 ; Gu, Kejia 1 ; Liu, Shaowen 1 ; Hou, Yanbing 3 ; Zhang, Jialei 3 ; Xu, Xiang 3 ; Li, Xuesheng 4 ; Pan, Canpin 1 ;
作者机构： 1.China Agr Univ, Coll Sci, Dept Appl Chem, Beijing 100094, Peoples R China
2.Hunan Plant Protect Inst, Changsha, Hunan, Peoples R China
3.Wuhan Syscan Technol Co Ltd, Wuhan, Peoples R China
4.Guangxi Univ, Inst Pesticide & Environm Toxicol, Nanning 530004, Peoples R China
关键词： Drinking water;Ion mobility spectrometry;Multiwalled carbon nanotubes;Pesticides
期刊名称：JOURNAL OF SEPARATION SCIENCE （ 影响因子：3.645； 五年影响因子：2.943 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： An analytical method based on dispersive solid-phase extraction with a multiwalled carbon nanotubes sorbent coupled with positive pulse glow discharge ion mobility spectrometry was developed for analysis of 30 pesticide residues in drinking water samples. Reduced ion mobilities and the mass-mobility correlation of 30 pesticides were measured. The pesticides were divided into five groups to verify the separation capability of pulse glow discharge in mobility spectrometry. The extraction conditions such as desorption solvent, ionic strength, conditions of adsorption and desorption, the amounts of multiwalled carbon nanotubes, and solution pH were optimized. The enrichment factors of pesticides were 5.4- to 48.7-fold (theoretical enrichment factor was 50-fold). The detection limits of pesticides were 0.01 approximate to 0.77g/kg. The linear range was 0.005-0.2mg/L for pesticide standard solutions, with determination coefficients from 0.9616 to 0.9999. The method was applied for the analysis of practical and spiked drinking water samples. All results were confirmed by high-performance liquid chromatography with tandem mass spectrometry. The proposed method was proven to be a commendably rapid screening qualitative and semiquantitative technique for the analysis of pesticide residues in drinking water samples on site.
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