Abstract
A new principle for the measurement of dynamic surface tension in aqueous solutions as proposed and experimentally verified by Volanschi [1] is based on the in situ generation of gas bubbles by means of electrolysis in a microcavity electrode. The frequency of the bubble train is dependent on the dynamic surface tension of the liquid. In this paper we present recent improvements of this sensor-actuator system resulting in a more straight forward sensor design, less electronics to operate the sensor, meanwhile obtaining a much wider measurement range and an increased sensitivity. Experiments show a proper operation of the sensor for surfactant concentrations in the range of 0.001g/l to 10g/l.
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References
Volanschi, A. (1996) Dynamic surface tension measured with single nucleation site electrodes, PhD thesis, University of Twente, Enschede, The Netherlands.
Olthuis, W., Volanschi, A., Bergveld, P. (1998) Dynamic surface tension measured with integrated sensor-actuator using electrolytically generated bubbles, Sensors and Actuators B 49, pp. 126–132.
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© 2001 Springer Science+Business Media Dordrecht
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Sprenkels, A.J., Bomer, J.G., Olthuis, W., Bergveld, P. (2001). An Improved Sensor-Actuator System for Dynamic Surface Tension Measurements. In: Elwenspoek, M. (eds) Sensor Technology 2001. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0840-2_26
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DOI: https://doi.org/10.1007/978-94-010-0840-2_26
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3841-6
Online ISBN: 978-94-010-0840-2
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