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Potentiometric Stripping Analysis at Antimony Film Electrodes
Author(s) -
Tesařová Eva,
Vytřas Karel
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.200804518
Subject(s) - antimony , bismuth , potentiometric titration , inorganic chemistry , halide , electrode , stripping (fiber) , chemistry , cadmium , mercury (programming language) , anodic stripping voltammetry , electrolyte , electrochemistry , materials science , organic chemistry , computer science , composite material , programming language
Abstract New procedures of potentiometric stripping analysis can be based on the use of antimony film electrodes and antimony(III) salts. In this paper, antimony films are generated onto carbon paste electrodes in situ and after electrolytic preconcentration of the metals to be determined, the excess antimony(III) serves as a chemical oxidant. Moreover in acidic solutions containing halide ions, the oxidation ability of antimony(III) is adequately limited because of formation of its corresponding halide complexes. Compared with similar total substitution of traditionally used mercury(II) by bismuth(III), the use of antimony(III) offers higher sensitivity in detection of heavy metals, namely, cadmium and lead.