eCite Digital Repository

Separation of inorganic and organic ionic components of Bayer liquor by capillary zone electrophoresis. I. Optimisation of resolution using electrolytes containing surfactant mixtures

Citation

Haddad, PR and Harakuwe, AH and Buchberger, W, Separation of inorganic and organic ionic components of Bayer liquor by capillary zone electrophoresis. I. Optimisation of resolution using electrolytes containing surfactant mixtures, Journal of Chromatography A, 706, (1-2) pp. 571-578. ISSN 0021-9673 (1995) [Refereed Article]


Preview
PDF
Restricted - Request a copy
563Kb
  

Copyright Statement

The definitive version is available at http://www.sciencedirect.com

Official URL: http://www.sciencedirect.com

DOI: doi:10.1016/0021-9673(94)01049-K

Abstract

The simultaneous separation of chloride, sulfate, oxalate, malonate, fluoride, formate, phosphate, carbonate and acetate in Bayer liquor using capillary zone electrophoresis with indirect detection is demonstrated using electrolytes comprising binary mixtures of the surfactants tetradecyltrimethylammonium bromide (TTAB) and dodecyltrimethylammonium bromide (DTAB). Two optimal electrolyte compositions were identified, namely 3 mM TTAB, 3 mM DTAB and 7.5 mM chromate at pH 9 (optimum 1) and 5 mM TTAB, 1 mM DTAB and 5.5 mM chromate at pH 9 (optimum 2). The separation selectivities of these electrolytes differ and the choice between them rests on consideration of the relative concentrations of the ionic species in the sample. Best results were obtained when the Bayer liquor sample was diluted by a factor of 500 before analysis. Linear calibrations were achieved in the working concentration range (110 μg/ml) and detection limits fell in the range 0.090.34 μg/ml for optimum 1 and 0.160.88 μg/ml for optimum 2. Recoveries of ions added to the diluted sample were close to quantitative, except for phosphate which showed low and variable recovery, and carbonate which was also variable due to absorption of carbon dioxide by the sample. Tartrate and succinate could not be resolved with either of the optimal electrolyte compositions.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Chemistry not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Haddad, PR (Professor Paul Haddad)
Author:Harakuwe, AH (Mr Anthony Hekare Harakuwe)
ID Code:4507
Year Published:1995
Web of Science® Times Cited:63
Deposited By:Chemistry
Deposited On:1995-08-01
Last Modified:2010-02-20
Downloads:0

Repository Staff Only: item control page