|
V. N. Oreshkin, G. I. Tsisin
New possibility of a crucible atomizer at
atomic absorption determination of trace elements in solid objects using
fractional evaporating
Abstract
A possibility
of atomic absorption determination of the elements in natural objects using the
improved model of a crucible atomizer of solid samples with several condensation
– evaporation zones has been shown. A new variant of fractional
preconcentration has been proposed, including two stages of high-temperature
and low-temperature thermal decomposition of the components of the solid sample
with evaporation and condensation of vapors of the elements in the heated and
unheated zones. This approach contributes to the more effective suppression of
non-selective interference and matrix influences, improving metrological
characteristics of determination of the elements in the samples of complex
composition.
Key words: electrothermal atomic absorption
analysis, crucible atomizers, fractional evaporation.
Copyright (C) Chemistry Dept., Moscow State University, 2002
|
|
