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Determination of Thallium at A Silver‐Gold Alloy Electrode by Voltammetric Methods in Plant Material and Bottom Sediment Containing Cd and Pb
Author(s) -
KrasnodębskaOstręga Beata,
Pałdyna Joanna,
Golimowski Jerzy
Publication year - 2007
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.200603762
Subject(s) - thallium , anodic stripping voltammetry , perchloric acid , cadmium , electrode , detection limit , gold alloy , alloy , stripping (fiber) , voltammetry , chemistry , supporting electrolyte , analytical chemistry (journal) , inorganic chemistry , electrochemistry , materials science , metallurgy , environmental chemistry , chromatography , composite material
The applicability of the subtractive anodic stripping voltammetry (SASV) using the square‐wave mode at the silver‐gold alloy electrode has been studied for thallium determination in the presence of large amount of lead and cadmium in natural samples. 10 mmol L −1 perchloric acid was found as the most suitable supporting electrolyte for determination in synthetic solutions. The thallium peak was separated about 200 mV from Cd+Pb peak. Diethylenetriaminepentaacetic acid addition was necessary to determine thallium at the silver‐gold alloy electrode in digested plant and sediment. The determination limit was equal to 1.4 μg L −1 . The method was validated by the inter‐method comparison (ICP‐MS).