Four-contact impedance spectroscopy of conductive liquid samples

Damjan Pelc, Sanjin Marion, Mario Basletić

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We present an improved approach to the impedance spectroscopy of conductive liquid samples using four-electrode measurements. Our method enables impedance measurements of conductive liquids down to the sub-Hertz frequencies, avoiding the electrode polarization effects that usually cripple standard impedance analysers. We have successfully tested our apparatus with aqueous solutions of potassium chloride and gelatin. The first substance has shown flat spectra from ∼100 kHz down to sub-Hz range, while the results on gelatin clearly show the existence of two distinct low frequency conductive relaxations.

Original languageEnglish (US)
Article number073907
JournalReview of Scientific Instruments
Volume82
Issue number7
DOIs
StatePublished - Jul 1 2011

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