Abstract
Ultrasound vibration potential techniques have been used for characterising colloidal systems and electrolytes. The generated electric potential, ion vibration potential (IVP), is detected as the acoustic wave is interacting with the ionic source. In this paper we attempt to study IVP measurements of NaCl, KCl, RbCl and CsCl with different concentrations. We demonstrate a new experimental approach with convenient access to the electrolyte and improved S/R ratio. In addition an external sensor is applied to the homogenous source in order to detect the IVP signal magnitude. The investigation reveals that the IVP magnitude is largest for CsCl (2.16⋅10−3mA) compared to NaCl (2.9⋅10−4mA), consequently the signal amplitude increases from 2.16⋅10−3mA to 2.65⋅10−3mA as the concentration varies from 1 to 3mol/L. However IVP magnitude decreases for CsCl from 2.65⋅10−3mA to 9.5⋅10−4mA as the excitation frequency increases from 0.5MHz, 1MHz to 2MHz.
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