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首页> 外文期刊>Electroanalysis >Electrocatalytic oxidation of cysteine at a cosalophen/ n-(butyl)_4siw_(12)o_(40) carbon paste electrode
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Electrocatalytic oxidation of cysteine at a cosalophen/ n-(butyl)_4siw_(12)o_(40) carbon paste electrode

机译：半胱氨酸在cosalophen / n-（丁基）_4siw_（12）o_（40）碳糊电极上的电催化氧化

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摘要

In the present study, a novel mixture consisting of N,N'-bis(salicylidene)-1,2-phenylenediamino cobalt (CoSalophen, CoSal) complex and (n-butyl)_4SiW_(12)O_(40) (SiW_(12)), have been used to chemically modify a carbon paste electrode (CPE) for sensitive determination of cysteine (CySH). The electrocatalytic effect of the newly developed modified CPE towards oxidation of CySH was evaluated by comparing cyclic and differential pulse voltammograms in the presence of cysteine at bare, CoSal, SiW_(12) and CoSal/SiW_(12) modified CPE. The differential pulse voltammetry method was applied as a sensitive method for quantitative detection of CySH trace amounts, the experimental conditions being optimized in order to evaluate the best analytical parameters of the sensor. Reproducibility and stability studies were also performed and the sensor was applied for the determination of CySH in a pharmaceutical sample and in human blood serum and urine samples.
机译：在本研究中，由N，N'-双（水杨基亚烷基）-1,2-苯二氨基钴（CoSalophen，CoSal）配合物和（n-丁基）_4SiW_（12）O_（40）（SiW_（12 ））已用于化学修饰碳糊电极（CPE），用于灵敏测定半胱氨酸（CySH）。通过比较半胱氨酸存在下裸，CoSal，SiW_（12）和CoSal / SiW_（12）修饰的CPE上的循环和差分脉冲伏安图，评估了新开发的修饰CPE对CySH氧化的电催化作用。差分脉冲伏安法被用作定量检测CySH痕量的灵敏方法，优化了实验条件以评估传感器的最佳分析参数。还进行了重现性和稳定性研究，并将该传感器用于测定药物样品以及人血清和尿液样品中的CySH。

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