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A Novel Catalytic Adsorptive Stripping Voltammetric Method of Iron Determination as Its 1,2‐Cyclohexanedione Dioxime Complex
Author(s) -
Bobrowski Andrzej,
Królicka Agnieszka
Publication year - 2003
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.200390074
Subject(s) - hanging mercury drop electrode , chemistry , detection limit , stripping (fiber) , catalysis , adsorption , supporting electrolyte , inorganic chemistry , adsorptive stripping voltammetry , ammonia , electrolyte , electrochemistry , nitrite , electrode , voltammetry , chromatography , materials science , biochemistry , organic chemistry , composite material , nitrate
The sensitive catalytic adsorptive stripping voltammetric method for the determination of trace iron in the supporting electrolyte consisting of 0.1 M ammonia buffer, 0.05–0.15 mM 1,2‐cycloheksanedione dioxime and 0.14 M NaNO 2 is presented. The method is based on adsorptive accumulation of an iron‐nioxime complex on a hanging mercury drop electrode, followed by a stripping voltammetric measurement of the catalytic reduction current of the adsorbed complex in the presence of sodium nitrite. The detection limit obtained for a 20 s accumulation time was 0.90 nM iron, the RDS was 3%, and the linearity range amounted from 3.6 to 107.4 nM of iron. Possible interferences from the coexisting ions and surface‐active substances were investigated.