碳工作电极上抗坏血酸和亚硫酸盐分析参数的比较研究

A. Pisoschi, A. Pop
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引用次数: 1

摘要

摘要本研究的目的是比较研究光谱碳电极作为工作电极在抗坏血酸和亚硫酸盐评价中的可行性。循环伏安法涉及电位的线性扫描,分析信号由被分析物的阳极氧化/阴极还原峰表示。对于这两种分析物,电氧化导致阳极峰,与抗坏血酸/亚硫酸盐浓度相关。对抗坏血酸的线性响应范围为0.07 ~ 10 mM,对亚硫酸盐的线性响应范围为15.5 ~ 4 g/L。抗坏血酸和亚硫酸盐的相对标准偏差RSD(%)分别为2.71%和2.88%。校正曲线斜率显示,抗坏血酸的灵敏度为88.88 μA/ mol /L,亚硫酸盐的灵敏度为477.37 μA/g/L。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative Assessment of the Analytical Parameters in Ascorbic Acid and Sulphite Assay at a Spectrographic Carbon Working Electrode
Abstract The aim of this study is the comparative investigation of spectrographic carbon electrode’s viability as working electrode, in ascorbic acid and sulphite asssessment. Cyclic voltammetry involves a linear sweeping of the potential, the analytical signal being represented by the anodic oxidation /cathodic reduction peak of the analyte. For both analytes, the electro-oxidation resulted in an anodic peak, correlable with ascorbic acid / sulphite concentration. The analytical range of linear response corresponded to 0.07 - 10 mM for ascorbic acid and to 15.5 mg/L - 4 g/L for sulphite. The relative standard deviation RSD (%) was 2.71 % for ascorbic acid and 2.88 % for sulphite. The sensitivities, given by the slopes of the calibration graphs were 88.88 μA/mmole/L for ascorbic acid and 477.37 μA/g/L for sulphite.
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