caa a22 4500 465749542 CHVBK 20180323111830.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00321877 doi (NATIONALLICENCE)springer-10.1007/BF00321877 Trace analysis of germanium [Elektronische Daten] Part 2. Polarographic behaviour and determination by adsorptive stripping voltammetry [Christine Schleich, Günter Henze] 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. Springer-Verlag, 1990 Schleich Christine Department of Inorganic and Analytical Chemistry, University of Trier, P. O. Box 3825, D-5500, Trier, Federal Republic of Germany aut Henze Günter Department of Inorganic and Analytical Chemistry, University of Trier, P. O. Box 3825, D-5500, Trier, Federal Republic of Germany aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/2(1990-01-01), 145-148 0937-0633 338:2<145 1990 338 216 https://doi.org/10.1007/BF00321877 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00321877 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schleich Christine Department of Inorganic and Analytical Chemistry, University of Trier, P. O. Box 3825, D-5500, Trier, Federal Republic of Germany aut NATIONALLICENCE 700 1- Henze Günter Department of Inorganic and Analytical Chemistry, University of Trier, P. O. Box 3825, D-5500, Trier, Federal Republic of Germany aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/2(1990-01-01), 145-148 0937-0633 338:2<145 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer