Determination of palladium by adsorptive stripping voltammetry |
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| Authors: | Marija Georgieva B Pihlar |
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| Institution: | (1) Institute of Chemistry, Faculty of Science, University of St. Cyril & Methodius, 91000 Skopje, Macedonia, XX;(2) Department of Chemistry and Chemical Technology, University of Ljubljana, 1000 Ljubljana, Slovenia, XX |
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| Abstract: | Adsorptive accumulation of the Pd(II) complex with dimethylglyoxime was evaluated for stripping voltammetry with respect
to different parameters. The sensitivity of the method and the linearity between the peak current and the concentration of
Pd(II) depends on the ionic strength, the electrode area, the preconcentration time, the transport rate to the electrode,
and the potential scan rate. The most appropriate medium was 0.1 mol/L acetate buffer between pH 3.5 and 4. Using 2 min of
preconcentration at a 2.6 mm2 electrode and the differential pulse mode, a detection limit of 0.05 μg/L Pd was achieved for liquid samples and 50 ng/g
for solid samples. Different aqueous and solid samples were analysed and the recovery from biological and inorganic materials
investigated.
Received: 29 February 1996/Revised: 29 July 1996/Accepted: 1 August 1996 |
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