Potentiometric Study of Coated Graphite Electrode and Polymeric Membrane Electrode for the Determination of Sm3+ Ion |
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| Authors: | Anjali Upadhyay A K Singh A K Jain Vinod Kumar Gupta Koteswara Rao Bandi |
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| Institution: | Department of Chemistry, Indian Institute of Technology‐Roorkee, Roorkee‐247667, India tel.: +91‐9412978289 |
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| Abstract: | Preliminary studies on the two Schiff bases N2‐((3H‐indol‐3‐yl)methylene)‐6‐phenyl‐1,3,5‐triazine‐2,4‐diamine (L1) and N2,N4‐bis((3H‐indol‐3‐yl)methylene)‐6‐phenyl‐1,3,5‐triazine‐2,4‐diamine (L2) have shown that they can act as Sm3+ selective electrodes. The performances of a polymeric membrane electrode and a coated graphite electrode based on L2 were compared and the CGE proved to be better, as it shows a low detection limit of 1.8×10?8 mol L?1, a Nernstian slope of 19.6±0.4 mV decade?1 of activity with a response time of 11 s in the pH range of 3.0–9.0. The CGE was used to determine Sm3+ in medicinal plants and soil samples. It was also used to determine fluoride ions in mouthwash samples and in toothpaste. |
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| Keywords: | Polymeric membrane electrodes Coated graphite electrodes Potentiometric electrodess Ion selective electrodes |
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