Abstract
A chemically modified carbon paste electrode was prepared by incorporating appropriate amounts of sodium humate(NaA). Palladium(II) was selectively accumulated in a solution of Britton-Robinson(B-R) buffer (pH 2.8) onto the electrode surface in open circuit mode. The subsequent electrochemical measurement was carried out by cyclic voltammetry (CV) and linear sweep anodic stripping voltammetry (LSASV) in a supporting electrolyte of 1.0 M HCl. The obtained oxidation currents (Ipa1 and Lpa2) were proportional to the Pd(II) concentration in the range of 4.7 × 10–6 - 9.4 × 10–8 M. The developed method was applied to the quantitative determination of palladium in real samples.
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Received: 6 March 1998 / Revised: 3 June 1998 / Accepted: 3 July 1998
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Sun, Q., Wang, C., Li, L. et al. Preconcentration and voltammetric determination of palladium (II) at sodium humate modified carbon paste electrodes. Fresenius J Anal Chem 363, 114–117 (1999). https://doi.org/10.1007/s002160051150
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DOI: https://doi.org/10.1007/s002160051150