Summary
The interfering effects due to the composition of the silicate matrix of a common geological sample have been overcome by an ion-exchange separation procedure.
The early described cation-exchange device allows a complete separation of the rare earth element group (plus barium, yttrium and scandium) from the major and minor elements of the matrix (i. e. calcium, iron, aluminium, sodium, etc.).
Some analytical flameless atomic absorption procedures have been carried out on the eluate fraction: dysprosium, holmium, thulium, ytterbium and europium are determined in international standard rocks and minerals. The REE (rare earth elements) values fall well into the range reported in literature.
Zusammenfassung
Die auf die Zusammensetzung von Silikaten zurückzuführenden Störungen bei der Analyse gewöhnlicher geologischer Proben lassen sich durch Ionenaustausch beseitigen. Der früher beschriebene Kationenaustausch ermöglicht die vollständige Abtrennung der Seltenen Erden (mit Barium, Yttrium und Scandium) von den Haupt- und Nebenbestandteilen der Matrix (d. h. Calcium, Eisen, Aluminium, Natrium usw.). Einige Verfahren zur analytischen AAS des Eluats wurden ausgearbeitet. Dysprosium, Holmium, Thulium, Ytterbium und Europium wurden in internationalen Standard-Gesteinsproben bestimmt. Die Ergebnisse liegen gut im Bereich der Literaturangaben.
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This work was carried out with a financial contribution of the “Consiglio Nazionale delle Ricerche” of Italy.
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Mazzucotelli, A., Frache, R. Electrothermal atomisation for atomic-absorption determination of some rare earths in silicate rocks and minerals. Mikrochim Acta 76, 323–328 (1981). https://doi.org/10.1007/BF01196748
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DOI: https://doi.org/10.1007/BF01196748