Detection of Pesticide Metsulfuron-methyl in Drinking Water by Differential Pulse Cathodic Stripping Voltammetry  

作　　者：Chuan JIANG Xuwei TANG Xiaolong ZOU Xiayi ZHANG Weibo ZHANG 

机构地区：[1]Lishui Institute of Food and Drug&Quality and Technical Inspection,Lishui 323000,China [2]Liandu District Adverse Drug Reactions Monitoring Station,Lishui 323000,China

出　　处：《Meteorological and Environmental Research》2020年第1期70-72,77,共4页气象与环境研究（英文版）

摘　　要：Differential pulse cathodic stripping voltammetry was used to determine pesticide metsulfuron-methyl on a suspended mercury electrode.Specific experimental parameters,such as the pH of Britton-Robinson buffer,accumulation time,accumulation potential,and initial potential were optimized.The results show that a typical reduction peak appeared when pH was 2.0-4.0 and initial potential ranged from-0.75 to-1.0 V.To obtain the stripping signal of the best reduction peak,it is determined that the best pH was 2.0.The detection limit of the method was only 0.04 mg/L,and it had good selectivity and high accuracy,so the method has high sensitivity.In the analysis of actual drinking water,the recovery rate of metsulfuron-methyl could reach 93%-101%.Differential pulse cathodic stripping voltammetry was used to determine pesticide metsulfuron-methyl on a suspended mercury electrode. Specific experimental parameters,such as the pH of Britton-Robinson buffer,accumulation time,accumulation potential,and initial potential were optimized. The results show that a typical reduction peak appeared when pH was 2. 0-4. 0 and initial potential ranged from-0. 75 to-1. 0 V. To obtain the stripping signal of the best reduction peak,it is determined that the best pH was 2. 0. The detection limit of the method was only 0. 04 mg/L,and it had good selectivity and high accuracy,so the method has high sensitivity. In the analysis of actual drinking water,the recovery rate of metsulfuron-methyl could reach 93%-101%.

关 键 词：Differential pulse cathodic STRIPPING VOLTAMMETRY Suspended MERCURY electrode Metsulfuron-methyl PESTICIDE Reduction peak 

分 类 号：TU991.21[建筑科学—市政工程]