Journal
JOURNAL OF SEPARATION SCIENCE
Volume 29, Issue 14, Pages 2256-2260Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.200600022
Keywords
capillary zone electrophoresis; environmental analysis; heavy metals; snow; transient isotachophoresis
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Online combination of transient ITP and CZE is employed for the determination of Cd(II), Pb(II), Cu(II), Ni(II), and Zn(II). Acetic acid is used for creating the transient isotachophoretic state. a-Hydroxyisobutyric acid and 4-aminopyridine are used as BGEs for the separation and indirect UV detection. At optimum conditions, the method allows to determine the metals at levels of 40 - 120 mu g/L, about 50 times more sensitive than conventional CZE. In combination with a 20-fold evaporative concentration, the method is suitable for environmental monitoring of the heavy metals in snow samples.
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