V. N. Oreshkina, Yu. G. Tatsiib, and G. L. Vnukovskayab
a Institute for Basic Problems of Biology, Russian Academy of Sciences, Pushchino, Russia
b Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
Received December 12, 2006
Abstract—A highly sensitive procedure is proposed for direct simultaneous atomic absorption determinations
of three elements (Ag, Cd, and Pb or Cd, Pb, and Tl) in marine and riverine particulate matter. To decrease the
influence of nonselective interference and matrix effects and to improve the detection limits of the elements,
the course of the analysis included a preliminary stage of fractional evaporation of the sample (a graphite rod
with a diaphragm as the evaporator) and condensation of the elements (a graphite rod as the collector). The con-
densate atomization proceeded in a rod–cell electrothermal graphite atomizer with independent heating of the
zones of evaporation and atomization.
DOI: 10.1134/S0001437007060136
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