An automatic colorimetric method for determining sulphate in natural water in the range of 5 to 400 mg per litre is presented. The method is based on the precipitation of barium sulphate and the release of the coloured acid chloranilate ion. A manifold has been developed for the determination of sulphate on the Technicon AutoAnalyzer. The proposed method will run 15 samples per hour.
M. E. Gales, W. H. Kaylor and J. E. Longbottom, Analyst, 1968, 93, 97 DOI: 10.1039/AN9689300097
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