Abstract
A simple voltammetric procedure for determining arsenic is conidered. It was tested in natural water and in substances suspended in river ecosystems of the Ob river basin. The results of analysis using the voltammetric procedure were verified by atomic absorption spectrometry after atomizing arsenic hydride in a fused-silica cell and by statistical methods employing standard criteria. Specific features of the electrochemical determination of arsenic and its spatial distribution in the Upper and Central Ob and in the Novosibirsk water storage basin were considered.
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