Aluminum(III)‐selective PVC Membrane Electrode Based on Salicylaldehyde Salicyloyl Hydrazone |
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| Authors: | X. L. Liu R. Yuan W. J. Xu Y. H. Ma Y. Q. Chai |
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| Affiliation: | 1. Ministry of Education Key Laboratory of Eco‐environments in Three Gorges Reservoir Region, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China;2. College of Chemistry and Pharmaceutical, Sichuan University of Science & Engineering, Zigong 643000, Si chuan Province, P. R. China |
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| Abstract: | A highly selective PVC membrane electrode for Al3+ based on salicylaldehyde salicyloyl hydrazone as a neutral carrier has been prepared and studied. The sensor exhibits a good response for Al3+ over a linear range of 9.0 × 10‐6 to 1.0 × 10‐1 mol/L, with a Nernstian slope of 20.0 ± 0.2 mV/decade and detection limit of 7.0 × 10‐6 mol/L. Selectivity coefficients determined by the method of separate solution indicate high selectivity for Al3+. The response mechanism was discussed in view of UV‐Vis spectroscopy technique and the A.C. impedance technique. It was used as an indicator electrode in potentiometric titration of Al3+ with EDTA and in the determination of Al3+ in real samples. The electrode has a relatively fast response time, long life time and satisfactory stability. |
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| Keywords: | Salicylaldehyde salicyloyl hydrazone Aluminum(III) ion‐selective electrode PVC membrane Potentiometry |
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