Trace analysis of germanium
Identifieur interne : 003601 ( Main/Merge ); précédent : 003600; suivant : 003602Trace analysis of germanium
Auteurs : Christine Schleich [Allemagne] ; Günter Henze [Allemagne]Source :
- Fresenius' Journal of Analytical Chemistry [ 0937-0633 ] ; 1990-01-01.
Abstract
Summary: The dp-polarographic and stripping voltammetric behaviour of germanium(IV) in the presence of various supporting electrolytes is discussed. Moreover, a highly sensitive adsorptive stripping voltammetric technique has been developed. The determination is based on the accumulation of germanium(IV)-diol complexes by adsorption at a hanging mercury drop electrode, followed by cathodic stripping voltammetry. Suitable for the complex forming reaction are catechol (1,2-dihydroxybenzol) and pyrogallol (1,2,3-trihydroxybenzol). By using pyrogallol the detection limit is 0.1 ng ml−1 with a standard deviation of ±13%. A multistage combined procedure with adsorptive stripping voltammetry is described for the determination of germanium traces in ginseng and garlic. The results are compared with those using extraction-spectrophotometry and atomic absorption spectrometry.
Url:
DOI: 10.1007/BF00321877
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