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Determination of Trace of Cobalt in Complex Matrices by Adsorptive Stripping Voltammetry at a Lead Film Electrode
Author(s) -
Tyszczuk Katarzyna,
Rutyna Iwona,
Korolczuk Mieczyslaw
Publication year - 2009
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804463
Subject(s) - cobalt , stripping (fiber) , bromide , adsorptive stripping voltammetry , detection limit , chemistry , electrode , anodic stripping voltammetry , voltammetry , calibration curve , analytical chemistry (journal) , piperazine , inorganic chemistry , electrochemistry , chromatography , materials science , organic chemistry , composite material
An adsorptive stripping voltammetric procedure for the determination of cobalt in a complex matrices at an in situ plated lead film electrode was described. The procedure exploits the enhancement effect of a cobalt peak observed in the system Co(II)–nioxime–piperazine‐1,4‐bis(2‐ethanesulfonic acid)–cetyltrimethylammonium bromide. The calibration graph was linear from 5×10 −10 to 2×10 −8 mol L −1 and from 1×10 −10 to 1×10 −9 mol L −1 for the accumulation times 120 and 600 s, respectively. The detection limit (based on the 3 σ criterion) for Co(II) following accumulation time of 600 s was 1.1×10 −11 mol L −1 . The interference of high concentrations of foreign ions and surfactants was studied.