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Determination of barium in strongly mineralised waters by atomic absorption spectrometry

Bestimmung von Barium in stark mineralisierten Wassern durch Atomabsorptionsspektrometrie

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Zusammenfassung

Eine zweistufige Abtrennung des Bariums wird vor der eigentlichen Bestimmung durchgeführt. Die Hauptmenge an Begleitionen wird durch Mitfällung an Bleichromat entfernt, die endgültige Isolierung und Konzentrierung in einem kleinen Volumen erfolgt durch nachfolgenden Kationenaustausch. So kann Barium mit Hilfe der üblichen AAS-Technik unter Verwendung einer Luft-Acetylen-Flamme bis herab zu 5 μg/l bestimmt werden. Neben Barium können bis 40 g Na+, 40 g K+, 10 g Ca2+ sowie 20 g SO4 2−/l vorhanden sein.

Summary

A method for the determination of barium in strongly mineralised waters was developed. Two-step separation of barium is used for its final determination by atomic absorption spectrometry. Coprecipitation with lead chromate separates barium from the bulk of accompanying elements; final isolation and concentration to a small volume of solution is achieved by subsequent cation-exchange chromatography. Thus, barium can be determined by conventional AAS technique using air-acetylene flame down to 5 μg per liter. The method permits barium determination in water samples containing up to e. g. 40 g of Na+, 40 g of K+, 10 g of Ca2+, 20 g of SO4 2− per liter.

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References

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Sixta, V., Mikšovský, M. & Šulcek, Z. Determination of barium in strongly mineralised waters by atomic absorption spectrometry. Z. Anal. Chem. 273, 193–195 (1975). https://doi.org/10.1007/BF00453521

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  • DOI: https://doi.org/10.1007/BF00453521

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