TITLE

Four-contact impedance spectroscopy of conductive liquid samples

AUTHOR(S)
Pelc, Damjan; Marion, Sanjin; Basletic, Mario
PUB. DATE
July 2011
SOURCE
Review of Scientific Instruments;Jul2011, Vol. 82 Issue 7, p073907
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
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.
ACCESSION #
63502308

 

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