V. Gupta, Ashutosh Kumar Singh, S. Mehtab
Apr 27, 2006
Citations
3
Influential Citations
342
Citations
Quality indicators
Journal
Analytica Chimica Acta
Abstract
Abstract A new PVC membrane electrode for Co 2+ 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 Co 2+ in real samples and as an indicator electrode in potentiometric titration of cobalt ions.