Construction and spectroscopic characterization of carbon potentiometric sensors zirconium selective

Abstract

4-chloro-N-(2,6-dimethylphenyl)-2-hydroxy-5-sulfamoylbenzamide (xipamide, XM) has been explored as an electroactive materials for preparing modified ion selective electrodes (screen printed (SPE) and carbon paste (CPE) electrodes) for potentiometric determination of zirconium ions. The sensing reaction between XM drug and zirconium ions on the surface of the electrodes was examined using morphological tools and IR spectra measurements. The electrodes exhibited a linear dynamic response within range of concentration from 1.0 × 10−6 to 1.0 × 10−2 mol L−1 with a trivalent nernstian slope of 20.0, 21.5 and 19.2 mV decade−1 for SPE (electrode I, TCP plasticizer) and CPEs (electrodes II and III using o-NPOE and TCP plasticizers, respectively). The potentiometric response of the electrodes was consistent over the pH range of 4–7 for electrodes (I and III) and 3–7 for electrode II with low detection limit of 1.0 × 10−6 mol L−1 for all electrodes. All electrodes had fast response time of 8, 10 and 11 s and can be utilized for 47, 21 and 10 days without any noteworthy alter in potential response for electrodes I, II and III, respectively. The electrodes showed good selectivity towards zirconium ions over large scale of metal ions. Analytical application of the electrodes has been examined for the quantitative determination of zirconium ions in different spiked water samples. The obtained results using the sensors were in assent with those gotten utilizing the reported method.