Abstract
The wet ashing of organic matter for Sb determination was investigated by using a radioactive tracer technique. Wet ashing with HNO/sub 3/ + HClO/sub 4/ mixtures leads to the formation of insoluble Sb compounds. All the Sb remains in solution when a HNO/sub 3/ + HClO/sub 4/ + H/sub 2/SO/sub 4/ mixture is used. The influence of the ashing vessel (glass and Teflon) and the oxidation state of Sb were also studied.
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