Abstract
Simultaneous adsorptive stripping voltammetric method for the determination of trace gallium(III) and germanium(IV) based on the adsorption of gallium(III) and germanium(IV)-catechol complex on the cyclic renewable mercury film silver based electrode (Hg(Ag)FE) is presented. The calibration graph is linear from 1.25 nM (0.09 μg L−1) to 90 nM (6.27 μg L−1) with correlation coefficient of 0.999 for gallium and from 2.5 nM (0.18 μg L−1) to 160 nM (12.3 μg L−1) with correlation coefficient of 0.998 for germanium for a preconcentration time of 30 s. The detection limit for a preconcentration time of 60 s is as low as 25 ng L−1 for gallium and 58 ng L−1 for germanium. The proposed method was successfully applied by studying the natural samples and simultaneous recovery of Ga(III) and Ge(IV) from spiked water and sediment samples.
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The study was financed as an R&D project by the Polish Ministry of Science and Education from research funds for the years 2007–2010 (Grant No. 15 020 02).
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Piech, R. Study on simultaneous measurements of trace gallium(III) and germanium(IV) by adsorptive stripping voltammetry using mercury film electrode. J Appl Electrochem 41, 207–214 (2011). https://doi.org/10.1007/s10800-010-0225-4
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DOI: https://doi.org/10.1007/s10800-010-0225-4