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Revista de Chimie (Rev. Chim.), Year 2008, Volume 59, Issue 8,

https://doi.org/10.37358/RC.08.8.1904

Elena Diacu

Surfactants Analysis from Natural Waters Using Nonfaradaic Processes

Abstract:

Voltammetric measurements of dissolved surface-active substances in aqueous solutions, as specific commercial detergents, are described in the present paper. Two voltammetric methods based on the adsorption phenomena at mercury electrode/aqueous solution interface were performed in order to obtain the analytical signal for the detergent analysis. The first method was direct current polarography (DC), based on the suppression of polarographic maxima of mercury (II) and the second method was the alternative-current polarography (AC)-the tensammetric method. Both methods are very sensitive, allowing to determine the traces of surface active substances in aquatic media, but the tensammetric method has the advantage to be easier to carry out for surfactants determinations. In order to evaluate the content of surfactants in the analysed water samples, the TRITON-X-100 equivalent values obtained have been correlated with the concentration of the detergents in water samples. Both proposed methods allow to determine the content of the surfactants in very low concentration and have been applied on real water samples.

Keywords:
surfactants; natural waters; pollution; voltammetry; tensammetry

Issue: 2008, Volume 59, Issue 8
Pages:
Publication date: 2008/9/9
https://doi.org/10.37358/RC.08.8.1904
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