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Abstract

This research aims to develop an ion Pb2+ sensor and determine the optimal conditions for testing Pb2+ ions using an MnO2/PGE modified electrode with the voltammetric method. In this study, the Pencil Graphite Electrode (PGE) was modified using MnO2 through drop-casting. Next, the optimization of the electrode was carried out by varying the supporting electrolyte type, voltammetric technique, and supporting electrolyte concentration. The results showed that the modified electrode (MnO2/PGE) provided a better response for Pb2+ detection compared to the unmodified electrode (PGE). The optimal experimental conditions were found to be 0.1 M HCl as a supporting electrolyte, combined with the Square Wave Voltammetry (SWV) technique. The measurement of Pb2+ ions using MnO2/PGE under optimum conditions yielded a correlation coefficient (R2) of 0.9846 and a detection limit of 1.91 ppm, with an RSD value of ± 2.51%, indicating high sensitivity, selectivity, stability, and accuracy in the measurement of Pb2+ metal ions.

Keywords

Analytical chemistry, Heavy metal detection, Lead ion analysis, Modified electrode, Square wave voltammetry

Subject Area

Chemistry

Article Type

Article

First Page

1398

Last Page

1409

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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