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Sol-gel derived potentiometric sensor for determination of vanadyl ions

机译：溶胶凝胶衍生的电位传感器，用于测定钒离子

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摘要

A sol-gel electrode, based on thiacalix[4]arene as a neutral carrier, was successfully developed for the detection of VO2+ in aqueous solutions. The sol-gel electrode exhibited linear response with Nernstian slope of 29.3 +/- 0.3 mV per decade, within the vanadyl ion concentration ranges 1.0 x 10(-6) - 1.0 x 10(-1) mol dm(-3). The sol-gel electrode shows detection limit of 4.9 x 10(-7) mol dm(-3). The influence of membrane composition, the pH of the test solution, and the interfering ions on the electrode performance were investigated. The electrode exhibited good selectivities for a number of alkali, alkaline earth, transition and heavy metal ions. The effect of temperature on the electrode response showed that the temperature higher than 60 degrees C deteriorates the electrode performance. Application of the electrode for the determination of vanadyl in spiked samples is reported.
机译：以硫杂杯[4]芳烃为中性载体的溶胶-凝胶电极成功开发用于检测水溶液中的VO2 +。溶胶-凝胶电极表现出线性响应，每十年的Nernstian斜率为29.3 +/- 0.3 mV，在钒离子浓度范围为1.0 x 10（-6）-1.0 x 10（-1）mol dm（-3）范围内。溶胶-凝胶电极的检测极限为4.9 x 10（-7）mol dm（-3）。研究了膜组成，测试溶液的pH值和干扰离子对电极性能的影响。电极对许多碱金属，碱土金属，过渡金属离子和重金属离子具有良好的选择性。温度对电极响应的影响表明，高于60摄氏度的温度会使电极性能下降。据报道，该电极可用于测定加标样品中的钒。

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