New Simple Ion-Selective Membrane Electrode for Serious Environmental Pollutant, Mercury (II), Analysis in Aqueous Solution, Fluorescent Mercury Lamp White Dust, Mercurochrome and Dental Alloy

Abstract

Background: Mercury in various forms constitute a serious environmental pollutant. Its exposure is still considered a world related risk for individuals in numerous manufacturers. The Context and Purpose of the Study: Because of it serious hazardous effects to human health, there is strong need to develop new tools for mercury ion determination in clinical analysis and environmental monitoring. This investigation describes for the first time the construction of a polyvinyl chloride (PVC) membrane electrode which is exceedingly specific to divalent mercury was formed by utilizing Hg[dimethylglyoxime (phene)]2+ as a suitable carrier. Results: The sensor exhibits a Nernestian response for mercury ions over a wide concentration range (5x10-7-5x10-2 molL-1) with a slope of 29±0.5 mV per decade. It has a reaction time of 30s and can be utilized for 2 months with no quantifiable divergence in potential. The electrode can be used in the pH range from 1.8-4.5.The average recovery obtained is 91.0% with standard deviation of 1.5% (n=8). Conclusion: The proposed sensor demonstrates genuinely great segregating capacity towards mercuric ions in correlation with some heavy metals. This sensor was utilized for the quantitative analysis of mercuric ions in its aqueous solution. Also, was applied in potentiometric titration as an indicator electrodefor Hg2+ in various real samples (e.g.; fluorescent mercury lamp white dust, mercurechrome and dental alloy). Keywords: Mercury(II) ion-selective electrode, PVC membrane, potentiometry, coated graphite rod, mercurochrome, dental alloy.