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Square‐wave voltammetric stripping analysis of thallium( III ) at a poly(4‐vinylpyridine)/mercury film electrode
Author(s) -
Zen JyhMyng,
Wu JyhWay
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.1140090408
Subject(s) - thallium , square wave , anodic stripping voltammetry , electrode , mercury (programming language) , chemistry , stripping (fiber) , chloride , voltammetry , inorganic chemistry , analytical chemistry (journal) , materials science , electrochemistry , chromatography , physics , organic chemistry , quantum mechanics , voltage , composite material , computer science , programming language
A poly(4‐vinylpyridine)/mercury film electrode (PVP/MFE) was used for the determination of trace thallium(III) by square‐wave anodic stripping voltammetry (SWASV). Thallium(III) is preconcentrated onto the PVP/MFE as the anionic forms in chloride medium by the ion‐exchange effect of the PVP. The high solubility of thallium in mercury further facilitates the accumulation effect. Various factors influencing the determination of thallium(III) were thoroughly investigated. This modified electrode displayed good resistance to interferences from surface‐active compounds and common ions and increased sensitivity when used in conjunction with SWASV. In addition, detection can be achieved without deoxygenation and the electrode can be easily renewed. Applicability to various water samples is illustrated.