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首页> 外文期刊>Electroanalysis >Electrocatalytic oxidation of dopamine and ascorbic acid on carbon paste electrode modified with nanosized cobalt phthalocyanine particles: Simultaneous determination in the presence of CTAB
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Electrocatalytic oxidation of dopamine and ascorbic acid on carbon paste electrode modified with nanosized cobalt phthalocyanine particles: Simultaneous determination in the presence of CTAB

机译：多巴胺和抗坏血酸在纳米钴酞菁粒子修饰的碳糊电极上的电催化氧化：在CTAB存在下的同时测定

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摘要

Metallophthalocyanine (MPc) and its derivatives are well known as electrocatalysts to catalyze oxidation or reduction of some species, such as cysteine, nitric oxide. Their nanosized particles may display the potential optics, electronic, catalytic and structural properties. In this paper, carbon paste electrodes modified with nanosized cobalt phthalocyanine particles (denoted as Nano-CoPc-CPE) are fabricated. The electrocatalytic oxidation of dopamine (DA) and ascorbic acid (AA) on the Nano-CoPc-CPE was investigated by means of cyclic voltammetry. Nano-CoPc particles perform good electrocatalytic activity to DA and AA. The anodic peak potentials of DA and AA were separated with good sensitivity in the presence of cetyltrimethylammonium bromide (CTAB). ne DA and AA can be simultaneously determined by using differential pulse voltammetry. On optimal conditions, the good linear response to DA and AA was observed in the range of 3.0 x 10(-6)-1.0 x 10(-4) M and 5.0 x 10(-6)-3.0 x 10(-4) M with the correlation coefficient of 0.9983 and 0.9978, respectively. Moreover, 100-fold AA did not interfere in the determination of DA. This method has been used to simultaneously determine DA and AA concentration in mixed drug samples with satisfactory results.
机译：金属酞菁（MPc）及其衍生物是众所周知的电催化剂，可催化某些物种的氧化或还原，例如半胱氨酸，一氧化氮。它们的纳米级颗粒可能显示出潜在的光学，电子，催化和结构特性。在本文中，制备了用纳米钴酞菁粒子修饰的碳糊电极（称为Nano-CoPc-CPE）。通过循环伏安法研究了纳米CoPc-CPE上多巴胺（DA）和抗坏血酸（AA）的电催化氧化。纳米CoPc颗粒对DA和AA具有良好的电催化活性。在十六烷基三甲基溴化铵（CTAB）的存在下，DA和AA的阳极峰电位具有良好的灵敏度。通过使用差分脉冲伏安法可以同时确定DA和AA。在最佳条件下，在3.0 x 10（-6）-1.0 x 10（-4）M和5.0 x 10（-6）-3.0 x 10（-4）的范围内观察到对DA和AA的良好线性响应M的相关系数分别为0.9983和0.9978。而且，AA的100倍数不会影响DA的测定。该方法已用于同时测定混合药物样品中的DA和AA浓度，结果令人满意。

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