M. Oubenali, Hayat El ouafy, Mouna Aamor, M. Mbarki, Aziz El Haimouti, T. EL Ouafy
{"title":"Investigation of Voltammetric Behavior of Herbicide N,N’-Ethylene- 2,2’-Bipyridinium using the Copper Modified Carbon Paste Electrode","authors":"M. Oubenali, Hayat El ouafy, Mouna Aamor, M. Mbarki, Aziz El Haimouti, T. EL Ouafy","doi":"10.17721/moca.2022.28-33","DOIUrl":null,"url":null,"abstract":"The reactivity of Diquat ion at the carbon paste electrode (C.P.E) modified by the copper (C.P.E-Cu) has been reported. The working electrode was prepared by mixing the copper with the carbon powder. The optimal potential window has been selected in the range from -1 V to 1.5 V. The effect of parameters such as pH, scan rate, preconcentration time and concentration has been studied by cyclic voltammetry. The preconcentration time is 13 minutes. The reactivity of Diquat on the electrochemical detector has been characterized by the appearance of the cathodic peak at 0.6 V in a solution of sodium sulfate (pH 3). Catalytic influence has been examined by cyclic voltammetry and electronic impedance spectroscopy. The calculated limits of detection and quantification have been 9.48·10-6 and 3.16·10-6 mol L-1, respectively. Then relative standard deviation (RSD) at 0.8·10-4 mol L-1 of Diquat was 5.77 % for nine repetitions. The analytical application was done in the determination of Diquat in real samples of apple juice with satisfying results.","PeriodicalId":18626,"journal":{"name":"Methods and Objects of Chemical Analysis","volume":"1 1","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Methods and Objects of Chemical Analysis","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.17721/moca.2022.28-33","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The reactivity of Diquat ion at the carbon paste electrode (C.P.E) modified by the copper (C.P.E-Cu) has been reported. The working electrode was prepared by mixing the copper with the carbon powder. The optimal potential window has been selected in the range from -1 V to 1.5 V. The effect of parameters such as pH, scan rate, preconcentration time and concentration has been studied by cyclic voltammetry. The preconcentration time is 13 minutes. The reactivity of Diquat on the electrochemical detector has been characterized by the appearance of the cathodic peak at 0.6 V in a solution of sodium sulfate (pH 3). Catalytic influence has been examined by cyclic voltammetry and electronic impedance spectroscopy. The calculated limits of detection and quantification have been 9.48·10-6 and 3.16·10-6 mol L-1, respectively. Then relative standard deviation (RSD) at 0.8·10-4 mol L-1 of Diquat was 5.77 % for nine repetitions. The analytical application was done in the determination of Diquat in real samples of apple juice with satisfying results.
期刊介绍:
The journal "Methods and objects of chemical analysis" is peer-review journal and publishes original articles of theoretical and experimental analysis on topical issues and bio-analytical chemistry, chemical and pharmaceutical analysis, as well as chemical metrology. Submitted works shall cover the results of completed studies and shall make scientific contributions to the relevant area of expertise. The journal publishes review articles, research articles and articles related to latest developments of analytical instrumentations.