title: Determination of some heavy metal cations in molten snow by transient isotachophoresis/ capillary zone electrophoresis.
abstract: 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. alpha-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 microg/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.
authors.affiliation: Environmental Chemistry and Ecotoxicology, University of Bayreuth, Bayreuth, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Petr
authors.forename: Silke
authors.initials: S
authors.lastname: Gerstmann
authors.forename: Hartmut
authors.initials: H
authors.lastname: Frank
mesh_terms: D002412:Cations / Q000032:analysis; D019075:Electrophoresis, Capillary / Q000379:methods* / Q000706:statistics & numerical data; D004785:Environmental Pollutants / Q000032:analysis; D005858:Germany; D019216:Metals, Heavy / Q000032:analysis*; D012914:Snow / Q000737:chemistry*
chemical_list: D002412:Cations; D004785:Environmental Pollutants; D019216:Metals, Heavy