We show the evaluation of electrical parameters of
liquids inside a Polydimethylsiloxane (PDMS) microchannel.
We utilize electrochemical impedance spectroscopy (EIS), a
suitable equivalent circuit diagram, describing the electrical
parameters of the liquid filled channel and parameter fitting
to gain access to said parameters. The influence of the volume
flow and conductivity of the liquid on the impedance
spectrum will be shown in the corresponding Bode- and
Nyquist plots, thus leading to an alteration of the fitting
parameters in the equivalent circuit. The evaluation of this
parameters, for both conductivity and flow rate
simultaneously, will enable the adjustment for the influence of
different conductivity liquids on the equivalent circuit
parameters for flow rate measurements.
Forschungs-