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The development of an automated HPLC system for the determination of trace-metals in concentrated brines and its application to process monitoring

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Abstract

Methodology based on high performance liquid chromatography (HPLC) has been developed for the determination of trace-metals in concentrated brines. Metal ions, (Al, Ba, Ca, Mg, Sr and Zn) were concentrated quantitatively and isolated from the sodium chloride matrix using a chelating ion-exchange column dynamically coated with the chelating dye xylenol orange. The pH dependence of the uptake of the metals was studied. Using the chelating ion-exchange preconcentration column followed by ion chromatography all the metals studied were determined at the low ng ml−1 level in concentrated brines and linear/workable calibrations were obtained in the concentration range of interest (<100 ng ml−1). The methodology developed was successfully transferred to an automated on-line monitoring system for the determination of Ba, Ca, Mg and Sr in concentrated feed brines used in the chlor-alkali industry.

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Authors and Affiliations

  1. Plymouth Analytical Chemistry Research Unit, Department of Environmental Sciences, Polytechnic South West, Drake Circus, PL4 8AA, Plymouth, UK

    Les Ebdon, Howard W. Handley & Philip Jones

  2. ICI Chemicals and Polymers Ltd., WA7 4QD, Runcorn, Cheshire, UK

    Neil W. Barnett

Authors
  1. Les Ebdon
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  2. Howard W. Handley
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  3. Philip Jones
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  4. Neil W. Barnett
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Ebdon, L., Handley, H.W., Jones, P. et al. The development of an automated HPLC system for the determination of trace-metals in concentrated brines and its application to process monitoring. Mikrochim Acta 104, 39–47 (1991). https://doi.org/10.1007/BF01245494

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  • DOI: https://doi.org/10.1007/BF01245494

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