首页> 外文期刊>Analytical Chemistry >SQUARE-WAVE VOLTAMMETRIC DETERMINATION OF URIC ACID BY CATALYTIC OXIDATION AT A PERFLUOROSULFONATED IONOMER RUTHENIUM OXIDE PYROCHLORE CHEMICALLY MODIFIED ELECTRODE
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SQUARE-WAVE VOLTAMMETRIC DETERMINATION OF URIC ACID BY CATALYTIC OXIDATION AT A PERFLUOROSULFONATED IONOMER RUTHENIUM OXIDE PYROCHLORE CHEMICALLY MODIFIED ELECTRODE

机译:方波伏安伏安法在全氟磺化离子型氧化钌焦绿化学修饰电极上催化氧化测定尿酸

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摘要

A Nafion/ruthenium oxide pyrochore (Pb2Ru2-xPbxO7-y) chemically modified electrode (CME) for the determination of uric acid by Osteryoung square-wave voltammetry (OSWV) is described. Compared to the glassy carbon electrode, the CME exhibits a 150 mV shift of the oxidation potential of uric acid in the cathodic direction and a marked enhancement of the current response, The best instrumental settings for OSWV are 50 Hz modulation frequency, 20 mV modulation amplitude, and 2 mV step height. Linear calibration curves are obtained over the 7.5 x 10(-5)-5 x 10(-7) M range in pH 1 buffer solution. The detection limit (3 sigma) is 1.1 x 10(-7) M. Ascorbic acid in less than 10-fold excess does not interfere. The practical analytical utility is illustrated by selective measurements of uric acid in human urine and serum without any preliminary treatment.
机译:描述了用于通过Osteryoung方波伏安法(OSWV)测定尿酸的Nafion /氧化钌吡咯(Pb2Ru2-xPbxO7-y)化学修饰电极(CME)。与玻璃碳电极相比,CME的尿酸氧化电位在阴极方向上变化了150 mV,电流响应明显增强。OSWV的最佳仪器设置是50 Hz调制频率,20 mV调制幅度,步长为2 mV。在pH 1缓冲溶液中,在7.5 x 10(-5)-5 x 10(-7)M范围内获得线性校准曲线。检出限(3 sigma)为1.1 x 10(-7)M。抗坏血酸的含量少于10倍不会干扰。通过选择性测量人尿和血清中的尿酸而不进行任何初步处理,就说明了实际的分析用途。

著录项

  • 来源
    《Analytical Chemistry》 |1995年第11期|p.1892-1895|共4页
  • 作者

    Zen JM; Tang JS;

  • 作者单位

    Zen JM, NATL CHUNGHSING UNIV, DEPT CHEM, TAICHUNG 402, TAIWAN;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分析化学;
  • 关键词

    Sensor;

    机译:传感器;
  • 入库时间 2022-08-18 01:05:41

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