Development of Chromium(III) Selective Potentiometric Sensor by Using Synthesized Triazole Derivative as an Ionophore

Pankaj Kumar,Kamaal G Shalaan,Harish Kumar Sharma

doi:10.1155/2013/142752

Abstract

A new poly(vinyl chloride) membrane based electrochemical sensor containing synthesized triazole compound, that is, bis-(4-N-amino-5-mercapto-1,2,4-triazol-3-yl)alkane (BAMTA) as an electroactive material was prepared and investigated as a chromium(III) selective sensor. The optimum composition of the best performing membrane contained triazole, sodium tetraphenylborate (NaTPB), nitrophenyl octyl-ether (NPOE), and polyvinyl-chloride (PVC) in the ratio 10 : 2 : 50 : 38 w/w. The sensor exhibited near Nernstian slope of <svg style="vertical-align:-0.3003pt;width:66.199997px;" id="M1" height="11.2875" version="1.1" viewBox="0 0 66.199997 11.2875" width="66.199997" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"> <g transform="matrix(.017,0,0,-.017,.062,10.863)"><path id="x31" d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z"/></g><g transform="matrix(.017,0,0,-.017,8.222,10.863)"><path id="x39" d="M244 635q90 0 143 -72t53 -177q0 -133 -65 -229.5t-171 -139.5q-79 -32 -140 -32l-5 30q109 18 185 91t101 186l-68 -36q-29 -16 -60 -16q-79 0 -129 51.5t-50 130.5q0 80 57 146.5t149 66.5zM228 602q-52 0 -78 -45.5t-26 -98.5q0 -69 36.5 -115.5t97.5 -46.5
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Highlights

Chromium nds its widespread use in steel manufacturing, leather tanning, wood treatment, electroplating, paint and pigment, metal nishing, and alloy manufacturing industries
Different types of electroactive materials have been used by researchers to develop chromium(III) ion-selective electrodes
The synthesized ionophore was used as a neutral carrier to prepare PVC based membranes and was tried to determine various metal ions

Summary

Introduction

Chromium nds its widespread use in steel manufacturing, leather tanning, wood treatment, electroplating, paint and pigment, metal nishing, and alloy manufacturing industries. Potentiometric monitoring offers many advantages such as simple instrumentation, speed and ease of preparation, low cost, online monitoring, wide dynamic range, good selectivity, and nondestructive analysis. Due to these advantages a number of ion-selective electrodes have been reported in the recent past and the list is continuously growing tremendously. Different types of electroactive materials have been used by researchers to develop chromium(III) ion-selective electrodes. Triazole, which is appropriately designed, exhibits a large variety of functions for example, inclusion compounds, selective complexing agents for metal ions, and catalysts. We report for the rst time a new, highly selective, and a sensitive Cr(III) electrode based on a synthesized, triazole derivative that is, Bis-(4-N-amino-5-mercapto1,2,4-triazol-3-yl)alkane as an excellent neutral carrier for chromium(III) ions. Various experimental conditions such as the percentage weight composition of the membrane ingredients and concentration of the internal solution of the developed electrode have been optimized to obtain better detection limit as well as working concentration range

Experimental

Results and Discussion

Conclusion