Carbon Paste Electrode Modified Zeolite-Iron as a Chromium(VI) Detection Medium

Authors

  • Zulhan Arif Department of Chemistry, IPB University, Jl Tanjung, Dramaga Campus, Bogor 16680, Indonesia https://orcid.org/0000-0001-6616-7063
  • Rofiqoh Inayati Agustina Department of Chemistry, IPB University, Jl Tanjung, Dramaga Campus, Bogor 16680, Indonesia
  • Heni Rahmawati Department of Chemistry, IPB University, Jl Tanjung, Dramaga Campus, Bogor 16680, Indonesia
  • Nazwa Aisyah Aini Department of Chemistry, IPB University, Jl Tanjung, Dramaga Campus, Bogor 16680, Indonesia
  • Eti Rohaeti Department of Chemistry, IPB University, Jl Tanjung, Dramaga Campus, Bogor 16680, Indonesia https://orcid.org/0000-0002-7945-8561

DOI:

https://doi.org/10.55749/ijcs.v3i2.64

Keywords:

Carbon paste electrode, Chromium(VI), Cyclic voltammetry, Iron-modified zeolite

Abstract

Chromium exists in two dominant species in nature, Cr(III) and Cr(VI). Both are stable; however, Cr(VI) exhibits significantly higher toxicity than Cr(III). Existing measurement methods could not differentiate between these two chromium species. Therefore, a more sensitive and selective measurement method was required for their speciation, particularly for Cr(VI) detection. In this study, a carbon paste electrode modified with zeolite and iron was developed for Cr(VI) measurement using the voltammetry method. The electrode was prepared by mixing graphite, iron-modified zeolite, and liquid paraffin. Measurements were conducted using cyclic voltammetry within a potential range of -1.2 V to 1.2 V. A 0.05 M KCl solution was used as the electrolyte. Electrode characterization was carried out concerning three parameters: the effect of analyte pH, preconcentration time, and the composition of iron-modified zeolite. The optimum Cr(VI) measurement was achieved in a 50 μM Cr(VI) solution at pH 3 using a carbon paste electrode with 20% iron-modified zeolite and a preconcentration time of 25 min. Under these optimal conditions, a cathodic peak current of 5.22 μA was obtained.

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Published

2024-12-31

How to Cite

Arif, Z., Agustina, R. I., Rahmawati, H. ., Aini, N. A. ., & Rohaeti, E. (2024). Carbon Paste Electrode Modified Zeolite-Iron as a Chromium(VI) Detection Medium. Indonesian Journal of Chemical Studies, 3(2), 58–65. https://doi.org/10.55749/ijcs.v3i2.64

Issue

Vol. 3 No. 2 (2024): Indones. J. Chem. Stud., December 2024

Section

Research Articles

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Copyright (c) 2024 Indonesian Journal of Chemical Studies

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