Voltammetric Determination of Nifedipine at a Hanging Mercury Drop Electrode and a Mercury Meniscus Modified Silver Amalgam Electrode

Mohd Dzul Hakim Wirzal; Abdull Rahim Mohd Yusoff; Jiri Zima; Jiri Barek

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Voltammetric Determination of Nifedipine at a Hanging Mercury Drop Electrode and a Mercury Meniscus Modified Silver Amalgam Electrode

机译：悬挂汞滴电极和弯月面修饰的银汞合金电极上的伏安法测定硝苯地平

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The voltammetric behavior of nifedipine (NFD) has been studied with two different types of workingelectrodes (hanging mercury drop mini-electrode (HMDmE) and mercury meniscus silver solidamalgam electrode (m-AgSAE)) using differential pulse voltammetry (DPV). The optimal conditionsfor DPV determination are: a mixture of Britton-Robinson (BR) buffer pH 8 with methanol in threedifferent ratios (1:1, 9:1, 99:1), respectively, in the concentration range of 0.2 to 20 mol/L. The limitof quantification (LQ) was found to be 0.12 mol/L (HMDmE) and 1.2 mol/L (m-AgSAE). Attemptsto increase the sensitivity using adsorptive stripping DPV at both HMDmE and m-AgSAE were notsuccessful. Using the optimum conditions, the practical application of the newly developed method hasbeen verified on the determination of NFD in spiked samples of drinking and river water.

机译：硝苯地平（NFD）的伏安行为已使用差分脉冲伏安法（DPV）用两种不同类型的工作电极（悬挂式汞滴小型电极（HMDmE）和汞弯月形银汞合金电极（m-AgSAE））进行了研究。确定DPV的最佳条件是：pH值为8的Britton-Robinson（BR）缓冲液与甲醇的混合物，其三种不同的比率（1：1、9：1、99：1）的浓度范围为0.2至20 mol / L.定量限（LQ）为0.12 mol / L（HMDmE）和1.2 mol / L（m-AgSAE）。在HMDmE和m-AgSAE均未尝试使用吸附剥离DPV提高灵敏度。在最佳条件下，新方法的实际应用已在饮用水和河水加标样品中NFD的测定中得到验证。

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《International Journal of Electrochemical Science》 |2015年第6期|共14页
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Mohd Dzul Hakim Wirzal; Abdull Rahim Mohd Yusoff; Jiri Zima; Jiri Barek;
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机译：悬汞滴电极对铬阳极溶出伏安法的分析

Voltammetric Determination of Nifedipine at a Hanging Mercury Drop Electrode and a Mercury Meniscus Modified Silver Amalgam Electrode

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