Anions in potable waters - Determination of Anions in Natural and Treated Waters - page 484

7.10 Chlorite

7.10.1 Titration method
The application of this technique is discussed under multianion analysis in section
14.3.1.1.

7.10.2 Flow injection analysis
Deitrich et al. [17] applied flow injection analysis and ion chromatography to the
determination of chlorite and chlorate in potable water.

7.10.3 Ion chromatography
Haufman and Bolyand [18] determined chlorite (ClO 2 − ) in potable waters by ion
chromatography.

7.11 Chlorolignosulphonate

7.11.1 Pyrolysis-gas chromatography

Van Loon et al. [19] have described a method of quantitative determination of
macromolecular chlorolignosulphonates in potable water, river water and sulphite pulp
mill effluents. The method is based on pyrolysis-gas chromatography-mass spectrometry.
Down to 16-32µg L −1 chlorolignosulphonates can be determined, 18-310µg L −1

having

been found in river water and 60µg L −1 in potable water.

7.12 Cyanide

7.12.1 Ion chromatography
The application of this technique to the determination of free cyanide is discussed under
multianion analysis in sections 12.6.4 and 12.6.5.

7.13 Fluoride

7.13.1 Spectrophotometric method
Anosova [20] determined fluoride in highly demineralised water by separating fluoride
ion as hydrofluoric acid by steam distillation of the sample (concentrated by evaporation
and treated with silver nitrate solution to precipitate chloride ion) from sulphuric acid