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Preparation of polymer‐coated electrodes containing metal ions complexing sites by electropolymerization of 2‐mercaptobenzimidazole and 2‐mercaptobenzothiazole on glassy carbon
Author(s) -
de Fátima Brito Sousa Maria,
Dallan Émerson José,
Yamaki Saulo Barbosa,
Bertazzoli Rodnei
Publication year - 1997
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.1140090807
Subject(s) - glassy carbon , monomer , polymer , electrode , metal ions in aqueous solution , differential pulse voltammetry , cyclic voltammetry , inorganic chemistry , horizontal scan rate , chemistry , electrochemistry , mercury (programming language) , metal , voltammetry , materials science , organic chemistry , computer science , programming language
The possibility of producing polymer‐coated electrodes containing complexing agents capable of collecting metal ions was investigated. The organic ligands 2‐mercaptobenzimidazole and 2‐mercaptobenzothiazole were used as monomers for electropolymerization on glassy carbon electrodes. The electroanalytical applicability of the modified electrodes was evaluated for Hg 2+ ions, by applying a chemical preconcentration step with subsequent measurement by differential pulse voltammetry. The influence of some electropolymerization parameters, such as scan rate, monomer concentration and the number of cyclic scans, on the voltammetric response of mercury(II) was studied. A 5 min preconcentration period allowed the detection of 0.08 mg/L (4.0 × 10 −7 mol L −1 ) mercury.