Abstract
In spite of its abundant occurrence in the earth's crust (310 mg Rb/kg) and its composition of a stable (72.2%) and a radioactive (27.8%) isotope, rubidium (Rb) belongs to the forgotten ultratrace elements. The interest in this ultratrace element grew considerably after Rb deficiency experiments with goats had shown that their growth was depressed, that >80% of them aborted their kids. The geological origin of the site takes significant effect on the Rb content of the flora. Granite and gneiss weathering soils produce the by far Rb-richest plant populations, and drinking water. The water of the gneiss sites contained 18 μg Rb/l, that of diluvial sands 3 μg/l. Herbivores store most Rb whereas carnivores and omnivores accumulate significantly less Rb. The analysis of 137 foodstuffs and beverages in 15-fold repetition showed that the starch-and sugar-rich cereals, pasta, bread and confectionary are poor in Rb (1 mg/kg dry mater (DM)). Fruit and vegetables accumulate between 5 and >60 mg Rb/kg (asparagus). Boiling drastically reduces the Rb content of vegetables. Animal foodstuffs are relatively poor in Rb. Poultry meat as well as freshwater fish are relatively rich in Rb. Coffee (40 mg/kg DM) and black tea (100 mg Rb/kg DM) store much Rb, 85% of which pass into the beverage.
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References
Angelow L (1994) Rubidium in der Nahrungskette. Habilitationsschrift, Friedrich-Schiller-Universität Jena
Anke M (1961) Z für Acker- und Pflanzenbau 112:113–140
Anke M, Arnhold W, Groppel B, Kräuter U, Müller M (1992) In: Brätter P, Gramm H-J (eds) Mineralstoffe und Spurenelemente in der Ernährung der Menschen. Blackwell Berlin, pp 64–85
Anke M, Lösch E, Krämer K, Glei M, Bugdol K (1992) In: Anonym (ed) Potassium in ecosystems. 23rd Colloquium of the International Potash Institute, Basel, pp 187–204
Anke M, Lösch E, Müller M, Groppel B (1992) In: Holtmeier HJ (ed) Bedeutung von Natrium und Chlorid für den Menschen. Springer, Berlin Heidelberg New York, pp 194–205
Anke M, Angelow L, Schmidt A, Gürtler H (1993) In: Anke M, Meissner D, Mills CF (eds) Trace elements in man and animals (TEMA-8). Media Touristik, Gersdorf, pp 719–723
Anke M, Groppel B, Bauch K-H (1993) In: Delange F, Dunn JT, Glinoer D (eds) Iodine deficiency in Europe. Plenum Press, New York London, pp 151–158
Anke M, Lösch E, Angelow L, Krämer K (1993) Mengen- und Spurenelemente 13:400–414
Anke M, Groppel B, Angelow L (1994) Tierenährung REKA-SAN 1:23–28
Börtitz S, Däßler H-G (1983) In: Anke M, Baumann W, Bräunlich H, Brückner Chr (eds) 4. Spurenelementsymposium, Leipzig, Jena, pp 10–17
Müller M (1993) Cadmiumaufnahme und Cadmiumausscheidung Erwachsener nach der Marktkorb- und Duplikatmethode. Dissertation, Friedrich-Schiller-Universität Jena
Van Renterghem D, Cornelis R (1988) In: Brätter P, Schramel P (eds) Trace elements analytical chemistry in medicine and biology. de Gruyter, Berlin, pp 55–63
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Anke, M., Angelow, L. Rubidium in the food chain. Fresenius J Anal Chem 352, 236–239 (1995). https://doi.org/10.1007/BF00322334
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DOI: https://doi.org/10.1007/BF00322334