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《Journal of Sichuan University of Science & Engineering(Natural Science Edition)》 2008-02
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Electrocatalytic Oxidation of Ascorbic Acid at Modified Electrode of Erichrome Black T

ZHANG Ying,SUN Yan-chun,XIANG Zheng,GUO Xiao-qun,LU Yan(Dept.of Chemistry,Sichuan University of Science & Engineering,Zigong 643000,China)  
Glassy carbon electrode modified with Erichrome Black T was fabricated by electrochemical polymerization.The modified electrode was applied to determination of ascorbic acid(AA) and characterized via cyclic voltammetry(CV).The resulting electrode showed excellent electrocatalytic activity towards oxidation of AA in 0.1 mol·L-1 phosphate medium at pH 6.0.Good linearity was obtained in the concentration range of 1.0×10-5~2.0×10-3mol·L-1 with a detection limit of 1.0×10-6 mol·L-1 under the optimum operations.Moreover,the resultant electrode combines characteristics of simple preparation,fast response and facilitated use.The studied electrode has been applied to the analysis of ascorbic acid samples with good results.
【CateGory Index】: R927
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【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 ZHONG Ming-hua (Department of Chemistry, Hanshan Normal University, Chaozhou 521041, China);Resonance Light Scattering Method for Determination of Ascorbic Acid[J];Food Science;2008-01
2 ZHANG Feng-ping1,2,3,ZHAO Yan2,LIU Yao-min2,SUO You-rui1,(1. Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810001,China;2. Tongwei Co. Ltd.,Chengdu 610041,China;3. Graduate University of Chinese Academy of Sciences,Beijing 100049,China);Comparative Analysis of Water-soluble Vitamins in Fruit Powders of Nitraria, Wolfberry and Seabuckthorn Grown in Qinghai-Tibetan Plateau[J];Food Science;2010-02
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1 Acrobic acid (Vc) can activates the hemoglobin-catalyzed reaction between hydrogen peroxide and L-tyrosine.There is a determinate linearity relation between fluorescence quenching degree and concentration of ascorbic acid.Under the optimum conditions the linear range of Vc is 0.8-25.6 ug/mL.The relative standard deviation is 4.25%.The detected limit is 0.0112ug/mL.the interference of the common irons is investigated.The method is applied to real samples with satisfactory results.;Study on the determination of ascorbic acid of drink by kinetics fluorescence quenching[A];[C];2007
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