Abstract
The energies of the chemisorption of As, Se, Pb, and Cd atoms by palladium and cobalt metal surfaces were calculated by a quantum chemistry method. The analytical applicability of a cobalt-containing chemical modifier based on activated carbon to the determination of the highly volatile elements by electrothermal atomic absorption spectrometry (ETAAS) was hypothesized. A procedure for the preparation of the cobalt-containing chemical modifier based on activated carbon was substantiated using thermodynamic simulation, thermal analysis, and ETAAS. This procedure ensured the formation of a Co0 metal phase and the occurrence of thermal stabilizing interactions with analytes at the stage of drying. The concentrations of arsenic and lead in the suspensions of a standard reference sample of marine algae were determined with the use of the developed chemical modifier based on activated carbon. The experimental results were consistent with the certified values.
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Original Russian Text © M.Yu. Burylin, S.E. Malykhin, E.F. Galai, 2015, published in Zhurnal Analiticheskoi Khimii, 2015, Vol. 70, No. 4, pp. 380–388.
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Burylin, M.Y., Malykhin, S.E. & Galai, E.F. Efficiency of a cobalt-containing matrix modifier based on activated carbon for the electrothermal atomic absorption determination of the highly volatile elements. J Anal Chem 70, 459–467 (2015). https://doi.org/10.1134/S1061934815040036
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DOI: https://doi.org/10.1134/S1061934815040036