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Selective and rapid ion-chromatographic determinations of alkaline earth metals and applications to the analysis of baryte

Selektive und schnelle ionen-chromatographische Bestimmungen von Erdalkalimetallen mit Anwendungen in der Barytanalyse

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  • Spectroscopic methods in materials research
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Summary

An ion-chromatographic procedure is described for the determination of Mg, Ca and Sr in the presence of an excess of Ba in baryte samples after a soda-potash digestion. The procedure is performed by coupling a strong acid exchanger (based on silica gel) and a post-column derivatisation using PAR-Zn-EDTA reagent and photometric detection at 495 nm. Further optimizations resulted in a mobile phase consisting of a citrate-oxalate-ethylendiamine solution. Details of the optimization procedures and the results of some baryte analyses are presented. The concentrations of Mg, Ca and Sr ranged between 0.01 and 2%. These results were verified using two reference methods (AAS and complexometric titration).

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Authors and Affiliations

  1. Department of Chemistry, Central South University of Technology, Changsha/Hunan, PR China

    Daren Yan & Jingan Zhang

  2. Institute of Inorganic and Analytical Chemistry, Technical University Clausthal, D-3392, Clausthal-Zellerfeld, Germany

    Georg Schwedt

Authors
  1. Daren Yan
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  2. Jingan Zhang
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  3. Georg Schwedt
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Additional information

Dedicated to Prof. Dr. G. Tölg on the occasion of his 60th birthday

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Yan, D., Zhang, J. & Schwedt, G. Selective and rapid ion-chromatographic determinations of alkaline earth metals and applications to the analysis of baryte. Z. Anal. Chem. 335, 687–691 (1989). https://doi.org/10.1007/BF01204071

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  • DOI: https://doi.org/10.1007/BF01204071

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