Rapid, Simple and Ultrasensitive Analysis of Paraquat in Drinking Water by Field-Amplified Sample Injection Combined with Pressure-Assisted Capillary Zone Electrophoresis
文献类型： 外文期刊
作者： Wang Ming-Ming 1 ; Shen Jing 2 ; Song Ting 1 ; Li Sheng-Qing 1 ; Chen Hao 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Sci, Wuhan 430070, Peoples R China
2.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Wuhan 430064, Peoples R China
关键词： Field-amplified sample injection;Capillary zone electrophoresis;Paraquat;Drinking water
期刊名称：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY （ 影响因子：1.134； 五年影响因子：0.909 ）
ISSN： 0253-3820
年卷期： 2012 年 40 卷 5 期
页码：
收录情况： SCI
摘要： Field-amplified sample injection (FASI) combined with pressure-assisted capillary zone electrophoresis (CZE) was developed for the determination of paraquat in drinking water. High reproducibility in FASI-CZE process could be attained with constant pressure applied at both ends of capillary. Compared with conventional hydrodynamic injection, the enrichment factor of 1174 was achieved for paraquat by FASI. Several parameters including length of water plug, injection time and composition of sample solution were systematically optimized. Linearity, sensitivity, precision and accuracy were investigated to validate the proposed method. The result showed that the calibration curve was linear at the concentration of 1.0-100 mu g/L with a correlation coefficient of 0.9975. The limit of detection was 0.039 mu g/L (S/N=3). Mean recovery of paraquat was ranged from 78.4% to 94.5% with relative standard deviation ranging from 3.0% to 10.4%. Finally, the method proposed was applied for the determination of paraquat in real drinking water.
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