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Direct Voltammetric Determination of Total Iron with a Gold Microelectrode Ensemble
Author(s) -
Zakharova E. A.,
Elesova E. E.,
Noskova G. N.,
Lu M.,
Compton R. G.
Publication year - 2012
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.201200417
Subject(s) - microelectrode , redox , chemistry , cathodic protection , electrochemistry , analytical chemistry (journal) , electrode , voltammetry , derivative (finance) , inorganic chemistry , chromatography , financial economics , economics
The behavior of the Fe(II)/(III) redox system at a Au microelectrode ensemble (Au‐MEE) based on a solid composite by means of direct and cyclic voltammetric analysis (VA) is reported. With a simple electrode activation and sample preparation, the influence of dissolved organic substances was eliminated, providing highly sensitive results. The analytical signal was based on the maximum cathodic current ( I ) of the first derivative (d I /d E ), and iron determination within the 0.002–0.04 mg L −1 range was studied. A sensitive LOD (3 σ ) value of 0.7 µg L −1 for total iron concentration was calculated; total iron determination in different waters was shown.