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The Electropolymerization of 2,6‐Diaminopyridine and Its Application as Mercury Ion Selective Electrode
Author(s) -
Bakhtiarzadeh Fariba,
Ab Ghani Sulaiman
Publication year - 2010
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.200900234
Subject(s) - potentiometric titration , electrode , absolute electrode potential , quinhydrone electrode , detection limit , chemistry , iodide , glass electrode , dropping mercury electrode , reference electrode , inorganic chemistry , potentiometric sensor , mercury (programming language) , saturated calomel electrode , analytical chemistry (journal) , working electrode , electrochemistry , chromatography , computer science , programming language
A composite graphite (CG) electrode modified with poly(2,6‐diaminopyridine) (PDAP) was used as solid state‐ion selective electrode for determination of mercury. The electrooxidation of monomer 2, 6 diaminopyridine (DAP) onto CG was accomplished from the 30 mM DAP in 5% H 2 SO 4 and 0.5 M ZnSO 4 . The electrode displayed Nernstian response with slope of 28.4±1 mV decade −1 in concentration range of 1×10 −6 to 1×10 −1 M and in solution of pH 3–5. The limit of detection for electrode was 3×10 −8 M with response time of 25 s. The electrode was also suitable as an indicator electrode in the potentiometric titration of Hg 2+ with iodide.
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