METHODS AND OBJECTS OF CHEMICAL ANALYSIS ISSN title: "Metody i obʺekty himičeskogo analiza" An international journal devoted to all aspects of Analytical chemistry ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)
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DIRECT ELECTROTHERMAL ATOMIC ABSORPTION DETERMINATION OF LEAD (Pb) AND ÑADMIUM (Cd) IN NATURAL WATERS USING FILTER FURNACE ATOMIZER

ZACHARIA A.N., KOLPAK R.N., POLISCHUK A.A., CHEBOTAREV A.N..

This work are devote to optimizing and justification of the conditions of direct ET AAS determination in various natural waters (river, mineral, drinking and sea) of micro (≥1·10,3 mg·dm,3) Pb and Cd with graphite "filter furnace" in the presence Pd (NO3)2, Mg(NO3)2, NH4H2PO4, (NH4)2HPO4 and its mixtures as of "matrix modifiers". The proposed method allowed to eliminate background absorption at the analysis of water with salinity ≤3.0 g·dm,3, the interference effect of ≤ 1,2 g·dm,3 of, as well as to increase up 2,3 times the sensitivity of Pb and Cd ET AAS determination.

Keywords: filter furnace atomizer, Pd, Cd, atomic absorption analysis, natural waters, matrix modifiers.