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Simultaneous Detection of Trace Cadmium(II) and Lead(II) Using an Unmodified Edge Plane Pyrolytic Graphite Electrode
Author(s) -
Lu Min,
Toghill Kathryn E.,
Compton Richard G.
Publication year - 2011
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.201000721
Subject(s) - pyrolytic carbon , anodic stripping voltammetry , cadmium , electrode , detection limit , bismuth , graphite , analytical chemistry (journal) , linear sweep voltammetry , voltammetry , materials science , stripping (fiber) , chemistry , electrochemistry , chromatography , cyclic voltammetry , metallurgy , pyrolysis , composite material , organic chemistry
We report the sensitive simultaneous detection of cadmium(II) and lead(II) using an unmodified edge plane pyrolytic graphite (EPPG) electrode via linear sweep anodic stripping voltammetry (LSASV). Simultaneous additions of the heavy metals gave two well separated stripping peaks observed over two linear ranges, 20 to 200 µg L −1 and 2 to 20 µg L −1 . These gave detection limits of 0.3 µg L −1 and 0.2 µg L −1 for cadmium(II) and lead(II), respectively. The use of unmodified EPPG electrodes shows comparable performance to bismuth and mercury modified electrodes, and offers a simple and effective alternative to modified systems.