Sol‐Gel Derived Potentiometric Sensor for Determination of Vanadyl Ions |
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Authors: | Majid Arvand Majid Moghimi Mohammad A. Bagherinia |
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Affiliation: | Department of Chemistry, Faculty of Science, Guilan University, P.?O. Box: 1914, Rasht, Iran |
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Abstract: | 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 1.0×10?6 – 1.0×10?1 mol dm?3. The sol‐gel electrode shows detection limit of 4.9×10?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 °C deteriorates the electrode performance. Application of the electrode for the determination of vanadyl in spiked samples is reported. |
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Keywords: | Vanadyl sensor Sol‐gel process Thiacalix[4]arene Poly(vinyl chloride) Potentiometry |
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