Four-contact impedance spectroscopy of conductive liquid samples

被引：8

作者：

Pelc, Damjan ^{[1
]}

Marion, Sanjin ^{[1
]}

Basletic, Mario ^{[1
]}

机构：

[1] Univ Zagreb, Dept Phys, Fac Sci, Zagreb 41000, Croatia

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2011年 / 82卷 / 07期

关键词：

electric impedance measurement; electrical conductivity; gelatin; potassium compounds; DIELECTRIC-SPECTROSCOPY; COLLOIDAL SUSPENSIONS; LOW-FREQUENCY; SPECTROMETER; 4-ELECTRODE; DIFFUSION; GELATIN;

D O I：

10.1063/1.3609867

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 similar to 100 kHz down to sub-Hz range, while the results on gelatin clearly show the existence of two distinct low frequency conductive relaxations. (C) 2011 American Institute of Physics. [doi:10.1063/1.3609867]

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页数：5

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