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Oxidation of Ascorbic Acid by Rutin at a Glassy Carbon Electrode Modified with Lipid Films
Author(s) -
Tang Jilin,
Wu Zhengyan,
Wang Jianguo,
Wang Erkang
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200111)13:16<1315::aid-elan1315>3.0.co;2-#
Subject(s) - rutin , ascorbic acid , glassy carbon , chemistry , electrode , carbon fibers , antioxidant , cyclic voltammetry , organic chemistry , materials science , electrochemistry , food science , composite material , composite number
A stable film was prepared by casting dipalmitoylphosphatidylcholine (DPPC) and rutin onto the surface of a glassy carbon (GC) electrode. The electrochemistry behavior of rutin in the DPPC film was investigated. The modified electrode coated with rutin shows a quasi‐reversible reduction‐oxidation peak on the cyclic voltammogram in phosphate buffer (pH 7.4). This model of biological membrane was not only used to provide biological environment but also to investigate the oxidation of ascorbic acid by rutin. The DPPC‐rutin modified electrode behaves as electrocatalytic oxidation to ascorbic acid. The oxidation peak current of ascorbic acid increases drastically and the peak potential of 4×10 −4 mol L −1 ascorbic acid shifts negatively about 100 mV compared with that obtained at a bare glassy carbon electrode. The catalytic current increased linearly with the ascorbic acid concentration in the range of 2×10 −4 mol L −1 and 1.4×10 −3 mol L −1 at a scan rate of 50 mV s −1 .