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首页> 外文期刊>American Journal of Analytical Chemistry >Stripping Voltammetric Determination of Uranium in Water Samples Using Hg-Thin Film Modified Multiwall Carbon Nanotube Incorporated Carbon Paste Electrode
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Stripping Voltammetric Determination of Uranium in Water Samples Using Hg-Thin Film Modified Multiwall Carbon Nanotube Incorporated Carbon Paste Electrode

机译：汞薄膜修饰多壁碳纳米管结合碳糊电极溶出伏安法测定水样中的铀

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摘要

The variables affecting determination of ultra trace levels of uranium (VI) in aqueous samples by differential pulse cathodic stripping voltammetry were examined in detail using Hg-thin film modified carbon paste and multiwall carbon nanotube (MWCNT) incorporated carbon paste electrode. Carbon paste electrode prepared in the laboratory was modified with Hg thin film and used as the working electrode. MWCNT was incorporated into the carbon paste for enhancement in sensitivity of the measurements. Electrochemical response for the uranium (VI) reduction peak was found to be well resolved on the thin mercury film modified carbon paste surface and also with the MWCNT modification. Characteristics of the adsorption preconcentration process were investigated using electrochemical impedance measurements. Electrochemical signals were observed to be enhanced on MWCNT modification of the carbon paste.
机译：使用汞薄膜修饰的碳糊和并入多壁碳纳米管（MWCNT）的碳糊电极，详细检查了影响通过差分脉冲阴极溶出伏安法测定含水样品中痕量铀（VI）的变量。用汞薄膜对实验室制备的碳糊电极进行修饰，并用作工作电极。将MWCNT掺入碳糊中以增强测量灵敏度。发现在薄汞膜改性的碳糊表面上以及在MWCNT改性下，铀（VI）还原峰的电化学响应得到了很好的解决。使用电化学阻抗测量研究了吸附预浓缩过程的特征。观察到碳糊的MWCNT修饰增强了电化学信号。

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