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  • Title: Spectrophotometric determination of germanium with Catechol Violet and cetyltrimethylammonium bromide.
    Author: Leong CL.
    Journal: Talanta; 1971 Aug; 18(8):845-8. PubMed ID: 18960953.
    Abstract:
    A ternary complex between germanium, Catechol Violet (CV) and cetyltrimethylanunoniuni bromide is proposed for the determination of germanium. The stoichiometric ratio Ge:CV is 1:2. Beer's law is obeyed from 0.1 to 1.0 ppm of Ge. The method is highly selective. Interference from Sn(IV), Fe(III), Bi(III), Cr(VI), Mo(VI), V(V) and Sb(III) in mg amounts is eliminated by extracting the germanium into carbon tetrachloride from 9M HC1 and then stripping into water before the photometric determination.
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