Keywords: palladium preconcentration, biosorption, slurry sampling, ETAAS, bakers yeast, Saccharomyces cerevisiae, electrothermal atomic absorption spectrometry, water pollution
Slurry sampling electrothermal atomic absorption spectrometric determination of palladium in water using biosorption with inactive baker's yeast Saccharomyces cerevisiae
Inactive cells of yeast Saccharomyces cerevisiae were used for palladium preconcentration. The conditions for biosorption of palladium and its determination in yeast cells by slurry electrothermal atomic absorption spectrometry (ETAAS) were optimised. The best sensitivity of measurements and stability of slurry were obtained by using a mechanical agitation (10 minutes) and a mixture of 0.3 mol l−1 thiourea – 1 mol l−1 HCl – 0.5% Triton X-100 as suspension medium. The repeatability of the measurements of Pd in yeast slurry was 6.5% (n = 10). For the quantification of analyte in spiked water samples, the standard addition method was used.