Voltammetric determination of D-penicillamine based on its homogeneous electrocatalytic oxidation with potassium iodide at the surface of glassy carbon electrode

Raoof J.-B.; Ojani R.; Majidian M.; Chekin F.

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Voltammetric determination of D-penicillamine based on its homogeneous electrocatalytic oxidation with potassium iodide at the surface of glassy carbon electrode

机译：碘化钾在玻碳电极表面均相电催化氧化伏安法测定D-青霉胺

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The electrooxidation of D-penicillamine (D-PA) has been studied in the presence of potassium iodide in various buffered aqueous solutions (4.00 ≤ pH ≤ 9.00) at the surface of glassy carbon electrode using cyclic voltammetry, differential pulse voltammetry and chronoamperometry. It has been found that under optimum pH (pH 5.00) in cyclic voltammetry, the electrooxidation of D-PA in the presence of potassium iodide as a homogeneous mediator occurred at a potential about 220 mV less positive than that in absence of potassium iodide at the surface of glassy carbon electrode. The homogeneous electrocatalytic oxidation current wave of D-penicillamine was linearly dependent on the D-PA concentration and a linear calibration curve was obtained in the ranges 3.0 × 10~(-5)-1.5 × 10~(-3) M and 9.0 × 10 ~(-6)-1.2 × 10~(-4) M of D-PA with cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods, respectively. The detection limits (2σ) were determined as 3.0 × 10~(-5) and 3.5 × 10~(-6) M with CV and DPV, respectively. This method was also used for voltammetric determination of D-PA in pharmaceutical preparation by standard addition method.

机译：使用循环伏安法，微分脉冲伏安法和计时电流法在玻璃碳电极表面的各种缓冲水溶液（4.00≤pH≤9.00）中存在碘化钾的情况下，研究了D-青霉胺（D-PA）的电氧化。已经发现，在循环伏安法的最佳pH（pH 5.00）下，在碘化钾作为均相介质存在下，D-PA的电氧化发生在比不存在碘化钾的情况下低约220 mV的正电势。玻璃碳电极的表面。 D-青霉胺的均相电催化氧化电流波线性依赖于D-PA浓度，并在3.0×10〜（-5）-1.5×10〜（-3）M和9.0×范围内获得线性校准曲线D-PA的10〜（-6）-1.2×10〜（-4）M分别采用循环伏安法（CV）和差分脉冲伏安法（DPV）方法。 CV和DPV的检出限（2σ）分别为3.0×10〜（-5）和3.5×10〜（-6）M。该方法还用于通过标准添加方法伏安法测定药物制剂中的D-PA。

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来源
《Russian journal of electrochemistry》 |2010年第12期|共7页
作者
Raoof J.-B.; Ojani R.; Majidian M.; Chekin F.;
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正文语种 eng
中图分类电化学、电解、磁化学;
关键词
homogeneous electrocatalysis; penicillamine; potassium iodide; voltammetric determination;

机译：均匀电催化青霉胺碘化钾伏安法测定;

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1. Voltammetric determination of D-penicillamine based on its homogeneous electrocatalytic oxidation with potassium iodide at the surface of glassy carbon electrode [J] . Raoof J.-B., Ojani R., Majidian M., Russian journal of electrochemistry . 2010,第12期

机译：碘化钾在玻碳电极表面均相电催化氧化伏安法测定D-青霉胺
2. Voltammetric sensor for D-penicillamine determination based on its electrocatalytic oxidation at the surface of ferrocenes modified carbon paste electrodes [J] . Fereshteh Chekin, Jahan-Bakhsh Raoof1, Reza Ojani Journal of Chemical Sciences . 2009,第6期

机译：二茂铁修饰的碳糊电极表面的电催化氧化测定D-青霉胺的伏安传感器
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Voltammetric determination of D-penicillamine based on its homogeneous electrocatalytic oxidation with potassium iodide at the surface of glassy carbon electrode

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