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V. N. Oreshkin, G. I. Tsisin
Sample
preparation in crucible atomizers at atomic absorption determination of cadmium
and lead in natural waters
Abstract
In crucible electrothermal atomizers at determination of trace elements
in the samples of natural waters by atomic absorption it is promising to carry
out two consecutive stages of sample preparation: dynamic preconcentration of
the dissolved forms of the elements on solid sorbent with simultaneous
selection of suspended matter and subsequent thermal decomposition of the
concentrate with fractional evaporation-condensation analyte. Such an approach
allows as to reduce risks of introduction of pollution and losses of the
elements. The first stage of sample preparation can be executed out of the
laboratory, in field conditions.
Key words:
electrothermal atomic absorption analysis, natural water samples preparation,
crucible atomizers.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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