Semi-quantitative field method for quantifying sodium hypochlorite in commercially sold chlorine solutions: Analysis of total residual chlorine in drinking water and swimming pool water
DOI:
https://doi.org/10.54495/Rev.Cientifica.v13i1.413Keywords:
semi-quantitative field method, sodium hypochlorite, analysis, total residual chlorine, drinking water, swimming poolAbstract
The present study was carried out with the aim of developing a set of reagents for the semi-quantification of total residual chlorine in chlorinated drinking water and swimming pool water, based on known colorimetric methods for the determination of total residual chlorine, such as the iodometric method, the o-tolidine method, the o-toluidine-aniline method, the benzidine-pyridine method and the qualitative method for the detection of sodium hypochlorite by means of the adsorption indicator, fluorescein. Of these, only the o-tolidine method and the benzidine method have the required sensitivity (0.3 to 3.0 ppm) for drinking water and swimming pool water. The final result was established based on the benzidine/pyridine method, obtaining a field method for the semi-quantitative determination of total residual chlorine with a sensitivity of 0.4 to 3.0 ppm.
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Copyright (c) 2000 E. Mendoza-Coloma, Adolfo León Gross
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