Abstract
A method is presented for simultaneous separation of traces of toxic and essential elements from soils. The method is based on programmed vacuum-thermic extraction of the elements in an oxidation-reduction medium. Under optimal conditions of temperature and pressure Pb, Zn, Cd, Bi, Tl, As, Sb, Te, Mo, Hg and Re are distilled or sublimated in elementary state or as oxides. A simple quartz apparatus is proposed. The elements extracted from matrix are dissolved in nitric acid and determined by AAS or OES with ICP excitation.
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