A cobalt(II)-selective PVC membrane based on a Schiff base complex of N,N′-bis(salicylidene)-3,4-diaminotoluene |
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Authors: | Vinod Kumar Gupta Ashok Kumar Singh Sameena Mehtab Barkha Gupta |
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Institution: | Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee 247667, India |
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Abstract: | A new PVC membrane electrode for Co2+ based on N,N′-bis(salicylidene)-3,4-diaminotoluene, an excellent neutral carrier, has been fabricated using sodium tetraphenylborate (NaTPB) as an anionic excluder and dioctylphthalte (DOP) as a solvent mediator. The electrode exhibits a linear potential response in the concentration range of 7.9 × 10−8 to 1.0 × 10−1 M with a slope of 30 ± 0.2 mV per decade. The detection limit of the proposed sensor is 5.0 × 10−8 M and it can be used over a period of 5 months. The proposed sensor revealed good selectivity over a wide variety of other cations including alkali, alkaline earth, heavy and transition metals and could be used in the pH range of 2.0-9.0. This electrode was successfully applied for the determination of Co2+in real samples and as an indicator electrode in potentiometric titration of cobalt ions. |
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Keywords: | Cobalt-selective electrode PVC membrane electrodes Schiff base and potentiometric sensors |
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