2026-04-14T09:45:58Zhttps://recercat.cat/oai/request
oai:recercat.cat:2445/2182702025-12-04T19:38:48Zcom_2072_1057col_2072_478813col_2072_478917
RECERCAT author Liendo, F. author Bryan Pichún, B. author Paz de la Vega, A. author Penagos, J. author Serrano i Plana, Núria author Díaz Cruz, José Manuel author Pizarro, J. author Segura, R. author Aguirre, M.J. 2025-01-30T18:01:38Z2025-01-30T18:01:38Z2024-09-092025-01-30T18:01:39Z In this study, a new and simple glassy carbon electrode modified with carbon nanohorns (SWCNH/GCE) was used for the determination of Cr(VI) in aqueous matrices via adsorptive cathodic stripping voltammetry (AdCSV). The modified electrode was characterized via field emission scanning electron microscopy and cyclic voltammetry, which revealed a homogeneous distribution of spherical agglomerates of SWCNH on the electrode surface. The modification increased the electrochemically active area from 0.10 cm2 ± 0.01 (GCE) to 0.16 cm2 ± 0.01 (SWCNH/GCE). The optimized analytical conditions were as follows: a supporting electrolyte (0.15 mol L−1 HCl), an accumulation potential of 0.8 V versus Ag/AgCl, and an accumulation time of 240 s. Validation of the analytical methodology was performed, obtaining a linear range between 20 and 100 µg L−1, a limit of detection of 3.5 µg L−1, and a limit of quantification of 11.6 µg L−1 with good accuracy and precision. The method was applied to the analysis of spiked tap water samples, and the results were compared using a flame atomic absorption spectrophotometer (FAAS) with no significant statistical differences. cc-by (c) Liendo, F. et al., 2024 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Carbó Electroquímica Voltametria Coal Electrochemistry Voltammetry Electrochemical sensor based on glassy carbon electrode modified with carbon nanohorns (SWCNH) for determination of Cr(VI) via adsorptive cathodic stripping voltammetry (AdCSV) in tap water info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion