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Capillary Zone Electrophoresis Method for the Determination of Sulfate in Concrete

Citation

Harakuwe, AH and Haddad, PR and Thomas, R, Capillary Zone Electrophoresis Method for the Determination of Sulfate in Concrete, Analytical Proceedings, 32, (12) pp. 493-494. ISSN 0003-2700 (1995) [Refereed Article]


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Copyright Statement

Copyright 1995 Royal Society of Chemistry

Official URL: http://www.rsc.org

DOI: doi:10.1039/AI9953200493

Abstract

A capillary zone electrophoresis (CZE) method for the determination of sulfate in concrete digested with concentrated nitric acid is described. An electrolyte containing 50 mmol l1 thiocyanate, 10 mmol l1 tris(hydroxymethyl)aminomethane, 2.5 mmol l1 tetradecyltrimethylammonium bromide and 140 g ml1 nitrate at pH 9 was used to separate the sulfate in under 12 min without significant interference from the highly acidic sample matrix containing a high level of nitrate. The external standard calibration curve was linear (r2= 99.6%) between 10 and 100 g ml1 and the limit of dectection (3 baseline noise) was < 4 g ml1. The precisions (sr) of absolute migration times and corrected peak areas were 1.7%(n= 5) and 3.6%(n= 5), respectively. The concentration of sulfate determined in one sample of concrete using CZE (0.5% m/m) was comparable to that obtained by standard gravimetric analysis (0.6% m/m).

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:Harakuwe, AH (Mr Anthony Hekare Harakuwe)
Author:Haddad, PR (Professor Paul Haddad)
Author:Thomas, R (Dr Rudi Thomas)
ID Code:4555
Year Published:1995
Web of Science® Times Cited:2
Deposited By:Chemistry
Deposited On:1995-08-01
Last Modified:2010-02-19
Downloads:0

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