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IJSTR >> Volume 9 - Issue 6, June 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Making And Evaluation Of Preparedness Of Solid Mercury-Graphite Electrodes For The Stripping Voltammetric Determination Of Trace Concentrations Of Heavy Metals

[Full Text]

 

AUTHOR(S)

Dmitry Aronbaev, Sergey Aronbaev, Abdullo Nasimov, Gaukhar Narmaeva

 

KEYWORDS

Stripping Voltammetry, Solid Electrodes, Suitability Criterion, Heavy Metals, Determination.

 

ABSTRACT

The article presents the results of a study on the manufacture of solid mercury-film graphite electrodes for stripping voltammetry and the selection of criteria for evaluating their suitability in the analysis of trace heavy metal contents. The ergonomic design of an indicator carbon-paste electrode made of a high purity graphite rod, coated with an insulating sheath made of a heat shrink tube and having a cavity for filling the electroactive mass from a mixture of graphite powder and paraffin is proposed. The relationship of such physical and mechanical parameters as the size and shape of graphite particles, the ratio of the ingredients of the electroactive mixture, the ohmic resistance of the manufactured electrodes with the range of working potentials and the residual current was studied. The choice of the criterion for determining the readiness of a mercury-film graphite electrode for voltammetric measurements is substantiated. The results of the stripping voltammetric determination of cadmium, lead and copper ions in environmental objects, food and drinks using the developed electrode are presented.

 

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