An ion chromatographic procedure was developed for the one-run determination of ClO-, ClO2- and ClO3- present at very different concentration levels in the same sample. The method is based on the quantitative and fast reduction of HClO in slightly acidic medium by added sodium nitrite, followed by the ion chromatographic determination of ClO2-, ClO3- and the generated NO3-. The possibility of amperometric titration of the 'free chlorine' with a standard solution of NaNO2 was also ascertained. The performance characteristics of the analysis were defined.
The use of the Nitrite Ion in the Chromatographic Determination of Large Amounts of Hypochlorite Ion and Traces of Chlorite and Chlorate Ions.
PASTORE, PAOLO;
1999
Abstract
An ion chromatographic procedure was developed for the one-run determination of ClO-, ClO2- and ClO3- present at very different concentration levels in the same sample. The method is based on the quantitative and fast reduction of HClO in slightly acidic medium by added sodium nitrite, followed by the ion chromatographic determination of ClO2-, ClO3- and the generated NO3-. The possibility of amperometric titration of the 'free chlorine' with a standard solution of NaNO2 was also ascertained. The performance characteristics of the analysis were defined.
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