Abstract
Abstract In this paper a highly selective method is described for the separation of micro- and milligram amounts of germanium from arsenic(III and V) as well as from many other metal ions by means of the strongly basic anion-exchange resin Dowex 1-X8. This separation procedure is based on the preferential elution of germanium tetrachloride from a column of this resin by means of a mixture consisting of 90% acetic acid and 10% 9 N hydrochloric acid, under which condition arsenic, iron, cobalt, copper, manganese, molybdenum, lead, bismuth, and several other metal ions are strongly retained by the resin as anionic chlorocomplexes while germanium passes into the eluate practically unadsorbed. For the final photometric determination of germanium directly in the eluate, a modification of the phenylfluorone method is employed.
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