Co-detection of Copper and Lead in Artisanal Sugarcane Spirit Using Caffeic Acid-modified Graphite Electrodes |
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| Authors: | Priscila I. Soares Thaís M. Lima Luiza. A. do Nascimento Rafael M. Coelho Diego L. Franco Arnaldo C. Pereira Lucas F. Ferreira |
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| Affiliation: | 1. Institute of Science and Technology, Federal University of the Jequitinhonha and Mucuri Valleys, UFVJM, Diamantina, 39100-000 Minas Gerais, Brazil;2. Institute of Chemistry, Federal University of Uberlândia, UFU, Patos de Minas, 38700-128 Minas Gerais, Brazil;3. Department of Natural Sciences, Federal University of São João del-Rei, UFSJ, São João del-Rei, 36307-352 Minas Gerais, Brazil |
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| Abstract: | Caffeic acid (CA)-modified graphite electrodes [GE/poly(CA)] was applied to the co-detection of copper and lead in artisanal sugarcane spirit using square-wave anodic stripping voltammetry (SWASV). Electrochemical and morphological studies were performed, and a mechanism for polymerization was proposed. Electropolymerization, SWASV, and analysis conditions parameters were optimized. Interferents, repeatability, reproducibility, and addition and recovery tests were carried out. GE/poly(CA) shows a linear range from 15 to 705 μg/L with a limit of detection of 3.01 μg/L for Pb(II) and 4.50 μg/L for Cu(II). Real samples of artisanal sugarcane spirit were used, and the electrochemical results were compared with atomic absorption spectroscopy experiments. |
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| Keywords: | Graphite electrodes Poly(caffeic acid) Artisanal sugarcane spirit Square wave anodic stripping voltammetry Lead Copper |
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