caa a22 4500 469129883 CHVBK 20180323133201.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF00324842 doi (NATIONALLICENCE)springer-10.1007/BF00324842 The use of polarographic methods for the evaluation of the stability of element species in food extracts [Elektronische Daten] [Holger Reinecke, Lothar Dunemann, Georg Schwedt] Summary: A new approach to the evaluation of binding stabilities and capacities of metals in their intrinsic matrices is presented. The applicability of polarography without previous matrix separation is demonstrated by the example of copper and nickel in food extracts. In such native solutions the interdependence of the metals and their potential binding partners is examined. The results show that copper is very specifically bound to sulfhydryl groups, whereas nickel is bound more or less unspecifically. Distribution patterns for binding stabilities and capacities are given for soybean flour and mate tea extract. Generally, copper has higher stabilities and capacities than nickel. As a special feature the displacement of nickel by copper is demonstrated. Springer-Verlag, 1992 Reinecke Holger Institut für Anorganische und Analytische Chemie, TU Clausthal, Paul-Ernst-Strasse 4, W-3392, Clausthal-Zellerfeld, Germany aut Dunemann Lothar Institut für Anorganische und Analytische Chemie, TU Clausthal, Paul-Ernst-Strasse 4, W-3392, Clausthal-Zellerfeld, Germany aut Schwedt Georg Institut für Anorganische und Analytische Chemie, TU Clausthal, Paul-Ernst-Strasse 4, W-3392, Clausthal-Zellerfeld, Germany aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 344/1-2(1992-09-01), 50-53 0937-0633 344:1-2<50 1992 344 216 https://doi.org/10.1007/BF00324842 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00324842 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Reinecke Holger Institut für Anorganische und Analytische Chemie, TU Clausthal, Paul-Ernst-Strasse 4, W-3392, Clausthal-Zellerfeld, Germany aut NATIONALLICENCE 700 1- Dunemann Lothar Institut für Anorganische und Analytische Chemie, TU Clausthal, Paul-Ernst-Strasse 4, W-3392, Clausthal-Zellerfeld, Germany aut NATIONALLICENCE 700 1- Schwedt Georg Institut für Anorganische und Analytische Chemie, TU Clausthal, Paul-Ernst-Strasse 4, W-3392, Clausthal-Zellerfeld, Germany aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 344/1-2(1992-09-01), 50-53 0937-0633 344:1-2<50 1992 344 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer