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首页> 外文期刊>Electroanalysis >Nonenzymatic glucose detection with good selectivity against ascorbic acid on a highly porous gold electrode subjected to amalgamation treatment
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Nonenzymatic glucose detection with good selectivity against ascorbic acid on a highly porous gold electrode subjected to amalgamation treatment

机译：在经过汞齐处理的高孔隙度金电极上对抗坏血酸具有良好选择性的非酶法葡萄糖检测

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摘要

A nonenzymatic glucose sensor with good selectivity for the ascorbic acid oxidation is presented. After the gold polycrystalline electrode was subjected to amalgamation treatment, two advantageous effects were observed. One is the enhancement of the surface roughness and the other is an increase in the catalytic current in the glucose oxidation. Besides the known first effect, the latter provided another advantageous effect in a fabrication of nonenzymatic glucose sensor. Using a gold electrode subjected to amalgamation treatment for 60 s, two calibration curves for glucose oxidation at two different potentials of -0.1 V and 0.25 V were obtained and compared. At the potential of -0.1 V, at which no ascorbic acid was oxidized and no interference effect was observed, a current sensitivity of 16 mu A cm(-2) mM(-1) from zero to 10 mM glucose concentration range was obtained. At the other potential of 0.25 V, at which ascorbic acid was easily oxidized, a satisfactory calibration curve with negligible ascorbic acid interference was also obtained together with a more enhanced current sensitivity of 32 mu A cm(-2) mM(-1).
机译：提出了一种对抗坏血酸氧化具有良好选择性的非酶葡萄糖传感器。将金多晶电极进行汞齐化处理后，观察到两个有利效果。一个是增加表面粗糙度，另一个是增加葡萄糖氧化中的催化电流。除了已知的第一效果外，后者在非酶葡萄糖传感器的制造中还提供了另一有利效果。使用经过60 s汞齐处理的金电极，获得并比较了在两个不同电势-0.1 V和0.25 V下葡萄糖氧化的两条校准曲线。在-0.1 V的电势下，没有抗坏血酸被氧化，也没有观察到干扰作用，从零到10 mM的葡萄糖浓度范围获得了16μA cm（-2）mM（-1）的电流灵敏度。在0.25 V的另一电势下，抗坏血酸容易被氧化，还获得了令人满意的校正曲线，抗坏血酸的干扰可忽略不计，同时电流灵敏度提高了32μA cm（-2）mM（-1）。

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