Salicylate Ion‐Selective Electrode Based on a Calix[4]arene as Ionophore |
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| Authors: | Melek Nur Ayanoğlu H. Elif Kormalı Ertürün Ayça Demirel Özel Özlem Şahin Mustafa Yılmaz Esma Kılıç |
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| Affiliation: | 1. Ankara University, Faculty of Science, Department of Chemistry, Ankara, Turkey;2. Sel?uk University, Faculty of Arts and Sciences, Department of Chemistry, Konya/Turkey |
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| Abstract: | A salicylate‐selective electrode based on calix[4]arene derivative was developed and its response characteristics were investigated. The optimum membrane composition was 1 % ionophore, 30 % PVC, 69 % DOS. The electrode exhibited a Nernstian slope of 58.8±0.5 mV/pSal in the range of 1.0×10?5–1.0×10?1 M with a detection limit of 4.3×10?6 M at pH 4.0, 20±1 °C. The potentiometric response of the electrode in the presence of different anions was investigated by the separate solution method. The lifetime was found at least 4 months, and its response time was 5–10 s. It was successfully used for the potentiometric determination of salicylate in pharmaceutical preparations. |
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| Keywords: | Salicylate‐selective electrode Calix[4]arene Potentiometry Salicylate determination |
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