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Journal of Sensors and Sensor Systems An open-access peer-reviewed journal
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Volume 3, issue 2
J. Sens. Sens. Syst., 3, 133–140, 2014
https://doi.org/10.5194/jsss-3-133-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
J. Sens. Sens. Syst., 3, 133–140, 2014
https://doi.org/10.5194/jsss-3-133-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular research article 03 Jul 2014

Regular research article | 03 Jul 2014

Electrochemical analysis of water and suds by impedance spectroscopy and cyclic voltammetry

R. Gruden1, A. Buchholz1, and O. Kanoun2 R. Gruden et al.
  • 1Seuffer GmbH & Co. KG, Bärental 26, 75365 Calw-Hirsau, Germany
  • 2Technische Universität Chemnitz, Reichenhainer Strasse 70, 09126 Chemnitz, Germany

Abstract. Optimum detergent dosage during a washing process depends on water quality, degree of pollution and quantity of laundry. Particularly, water quality is an important factor. Other parameters like carbonate- or non-carbonate hardness and calcium / magnesium (Ca / Mg) ratio in addition to total hardness of water have an impact on the amount of detergent. This work discusses the possibilities realizing a detergent sensor that measures important parameters for the washing process and assess the ideal necessary amount of detergent during the washing process. The approach is to combine impedance spectroscopy with cyclic voltammetry in order to determine both water quality and concentration of detergent in the suds which build up the basis for an optimum detergent dosage. The results of cyclic voltammetry show that it is possible to identify the Ca / Mg ratio and the carbonate hardness separately, which is necessary for the optimization of the washing process. Impedance measurements identify total hardness and detergent concentrations.

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