title: Analyte preconcentration and separation from small volumes by electrodeposition for electrothermal atomic absorption spectroscopy.
abstract: Electrodeposition of Pb from 50 mul volumes of 0.1M KCl solution was studied by electrolysis at uncontrolled potentials of 4.0-6.0 V on a pyrolytic graphite platform cathode. Deposition efficiency was evaluated as a function of time by ASV measurements on aliquots of the electrolysed solution. Quantitative separation of the analyte from the matrix was achieved in a relatively short time, aided by convective stirring of the sample achieved through gas evolution. Thus, the feasibility of rapid electrodeposition directly in a pyrolytic graphite-coated furnace has been demonstrated, allowing construction of an automated electrodeposition-electrothermal atomic absorption spectroscopic system.
authors.affiliation: Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
authors.forename: J P
authors.initials: JP
authors.lastname: Matousek
authors.forename: H K
authors.initials: HK
authors.lastname: J Powell