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The spectrochemical determination of total strontium in bone, milk and vegetation

Samples of bone ash are mixed with anhydrous copper sulphate and graphite and pelleted A d c. arc is used to excite the spectra which are then evaluated by microphotometry The effective concentration range is 50 – 350 p p. m of strontium in the ash and the coefficient of variation is 6% for single e...

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Bibliographic Details
Published in:Analytica chimica acta 1960-01, Vol.22, p.145-152
Main Authors: Jury, R.V., Webb, M.S.W., Webb, R.J.
Format: Article
Language:English
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Summary:Samples of bone ash are mixed with anhydrous copper sulphate and graphite and pelleted A d c. arc is used to excite the spectra which are then evaluated by microphotometry The effective concentration range is 50 – 350 p p. m of strontium in the ash and the coefficient of variation is 6% for single exposures at the 90 p p m level In the case of milk and vegetation, strontium and calcium are separated as insoluble oxalates and the strontium content of this fraction determined by a method similar to that used for bones, with a similar range and accuracy. An alternative flame photometric method is described for the determination of strontium in the calcium-strontium oxalate fraction, thc coefficient of variation of the whole analytical operation being 5% per determination Une méthode spectrochimique est proposée pour le dosage du strontium dans les os, le lait et les plantes. La cendre d'os à analyser est mélangée à du sulfate de cuivre anhydre et á du graphite; ce mélange est ensuite comprimé et prét pour la détermination spectrochimique. Dans le cas dn lait et des plantes, le strontium doitêtre séparé préalablement sous forme d'oxalate Es wird eine Methode beschrieben zur spektralanalytischen Bestimmung von Strontium in Knochen, Milch und Pflanzen Bei der Untersuchung von Knochen wird deren Asche mit wasserfreiem Kupfcrsulfat und Graphit zu Pillen gepresst. Bei Milch und Pflanzen muss das Strontium vor der Bestimmung als Oxalat abgetrennt werden.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(00)88259-8