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Square-wave voltammetric determination of thallium using surface modified thick-film graphite electrode with Bi nanopowder by Gyoung-Ja Lee; Hi Min Lee; Young Rang Uhm; Min Ku Lee; Chang-Kyu Rhee is a Engineering article available to read on EtoBox.

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Trace analysis of thallium at surface modified thick-film graphite electrode with Bi nanopowder has been carried out using square-wave anodic stripping voltammetry (SWASV) technique. The Bi nanopowder electrode exhibited a well-defined response relating to the oxidation of Tl. From the linear relationship between Tl concentration and peak current, the sensitivity of the Bi nanopowder electrode was quantitatively estimated. The detection limit of Tl was determined to be 0.03 lg/L for 1.0 lg/L Tl solution under 10 min accumulation, which is lower than the reported values for a Bi film electrode. Furthermore, it is confirmed that EDTA addition effectively eliminates the Pb and Cd interferences in the course of Tl determination by forming complexes with Pb 2+ and Cd 2+ .

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Author

Gyoung-Ja Lee; Hi Min Lee; Young Rang Uhm; Min Ku Lee; Chang-Kyu Rhee

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1388-2481)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)