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Anodic Stripping Voltammetric Determination of Thallium(III) Using a Tosflex/Mercury Film Electrode
Author(s) -
Lu TsaiHwa,
Sun IWen
Publication year - 1998
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/(sici)1521-4109(199810)10:15<1052::aid-elan1052>3.0.co;2-z
Subject(s) - thallium , anodic stripping voltammetry , electrode , mercury (programming language) , detection limit , chemistry , dropping mercury electrode , chloride , anode , working electrode , inorganic chemistry , voltammetry , reference electrode , stripping (fiber) , absolute electrode potential , saturated calomel electrode , analytical chemistry (journal) , electrochemistry , materials science , chromatography , organic chemistry , composite material , computer science , programming language
A Tosflex/mercury film electrode (TMFE) was prepared by spin‐coating a solution of the perfluorinated anion exchange polymer Tosflex onto a glassy carbon electrode surface followed by electrodeposition of a mercury film on this electrode. This electrode was used for the determination of trace thallium(III) which was preconcentrated onto the TMFE as the [TlCl 4 ] − anion in a chloride medium by the anion‐exchange feature of Tosflex and then determined by anodic square‐wave stripping voltammetry (SWSV). Various parameters influencing the determination of thallium(III) were examined in detail. With 1 min accumulation, the analytical signal versus concentration dependence was linear from 0 to 80 ppb, and the detection limit was 0.1 ppb. The modified electrode showed good resistance to interferences from surface‐active compounds and common ions. For repetitive use, the TMFE surface could be easily regenerated by setting the electrode potential at −0.4 V for 30 s.