Electrocatalytic Oxidation and Flow-Injection Determination of Sulfur-Containing Amino Acids at Graphite Electrodes Modified with a Ruthenium Hexacyanoferrate Film
Electrocatalytic Oxidation and Flow-Injection Determination of Sulfur-Containing Amino Acids at Graphite Electrodes Modified with a Ruthenium Hexacyanoferrate Film
复制标题
六氰基铁酸钌薄膜修饰石墨电极电催化氧化和流动注射测定含硫氨基酸
DOI：
10.1023/b:janc.0000008953.67244.c2
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发表时间：
2003
影响因子：
1.1
通讯作者：
G. K. Budnikov
中科院分区：
文献类型：
--
作者：
L. G. Shaidarova;S. Ziganshina;L. N. Tikhonova;G. K. Budnikov
研究了含硫氨基酸（半胱氨酸、胱氨酸和蛋氨酸）在铁氰化钌（III）膜修饰石墨电极上的电化学行为。采用玻璃碳和碳糊作为石墨材料。氨基酸在修饰电极上的电催化氧化导致氨基酸的氧化电位降低，其氧化峰电流增加，与未修饰电极上观察到的相比。本文研究了半胱氨酸、胱氨酸和蛋氨酸在铁氰化钌（III）无机膜修饰碳糊电极上的流动注射电催化测定的伏安特性和流体动力学条件。
The electrochemical behavior of sulfur-containing amino acids (cysteine, cystine, and methionine) at graphite electrodes modified with a ruthenium(III) hexacyanoferrate(II) film was studied. Glassy carbon and carbon paste were used as graphite materials. The electrocatalytic oxidation of amino acids at a modified electrode resulted in a decrease in the oxidation potentials of amino acids and an increase in the currents of their oxidation peaks as compared to those observed at an unmodified electrode. The voltammetric characteristics and hydrodynamic conditions for detecting the maximum catalytic current were found. A procedure is proposed for the electrocatalytic determination of cysteine, cystine, and methionine at a carbon-paste electrode modified with an inorganic film of ruthenium(III) hexacyanoferrate(II) under the conditions of flow-injection analysis.