Electroanalytical Studies of Chromone Based Ionophores for the Selective Determination of Arsenite Ion |
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| Authors: | Neha Gupta Ashok Kumar Singh Shubhrajyotsna Bhardwaj Divya Singhal |
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| Affiliation: | Department of Chemistry, Indian Institute of Technology‐Roorkee, Roorkee‐247667, India |
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| Abstract: | Two chemosensors 4H‐1‐benzopyran‐3‐carboxaldehyde, 4‐oxo‐, 3‐(2‐phenylhydrazone), I1] and 4H‐1‐benzopyran‐3‐carboxaldehyde, 4‐oxo‐, 3‐2‐(2,4‐dinitrophenyl)hydrazone], I2] with hydrazone‐NH group as binding site have been shown excellent selectivity for arsenite ion. It is confirmed by the UV‐vis titration that I2 is more selective than I1. The performance of the coated graphite electrode (CGE) was found to be better than polymeric membrane electrode (PME) in terms of linear range of 4.89×10?7–1.0×10?1 mol L?1, low detection limit of 8.31×10?8 mol L?1 and short response time. The proposed sensors were also used to determine the arsenite ion in different water samples. |
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| Keywords: | Arsenite colorimetric sensor Arsenite selective sensor Coated graphite electrode Polymeric membrane electrode |
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