Journal
INORGANIC MATERIALS
Volume 52, Issue 14, Pages 1383-1390Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0020168516140041
Keywords
iron; activated carbon; chemical modifier; atomic absorption spectrometry; thermodynamic modeling; quantum chemistry; volatile elements
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Funding
- State Task of the Ministry of Education and Science of the Russian Federation [4.873.2014/k]
- Russian Foundation for Basic Research and Administration of Krasnodar Krai [13-03-00392, 13-03-96500 r_yug_a]
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The energies of chemisorption of As, Se, Pb, and Cd atoms by the metal surface of iron are calculated by the quantum chemistry method. The possibility of analytical application of an iron-containing chemical modifier (CM) on the basis of activated carbon for ETAAS determination of volatile elements is suggested. By the methods of thermodynamic modeling, thermal analysis, and ETAAS, the preparation procedure of iron-containing CM is justified on the basis of activated carbon, which ensures the formation of the metallic phase Fe-0 and the course of low-temperature thermal stabilization of analytes. Using the developed chemical modifier, the contents of As, Cd, and Pb are determined in the suspensions of the standard sample of seaweeds. The results are in satisfactory agreement with the certified values.
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