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Hydroxymethanesulphinate salts and related decomposition products in wastewater

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Abstract

Hydroxymethanesulphinate (HMS) and its decomposition products such as HCHO, Zn and sulphites can be determined quantitatively in each other's presence by a polarographic method. In the alkaline medium it is possible to have well defined and separated waves relative to the oxidation of HMS ion and to the reduction of HCHO and zincate ion. The quantitative determination of these compounds is carried out with standard addition methods since the concentration-current relationship is linear. The SO2 is determined in HClO4 0.1 M and in the same sample it is possible to determine even HMS, HCHO and Zn after addition of NaOH up to 0.1 M. Moreover, a method of indirect determination of HMS is herein described. This is based on the determination of HCHO released by means of a weak oxidation of HMS which is stoichiometrically proportional to the total HMS. The method is sensitive and is made specific for such types of wastewater which come from textile industries.

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Authors and Affiliations

  1. Institute of Analytical Chemistry, University of Florence, Via Gino Capponi 9, 50121, Florence, Italy

    Emilia Barbolani Piccardi & Paola Legittimó Cellini

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  1. Emilia Barbolani Piccardi
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  2. Paola Legittimó Cellini
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Barbolani Piccardi, E., Legittimó Cellini, P. Hydroxymethanesulphinate salts and related decomposition products in wastewater. Water Air Soil Pollut 9, 301–307 (1978). https://doi.org/10.1007/BF00280678

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  • DOI: https://doi.org/10.1007/BF00280678

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