Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6602836 | Electrochimica Acta | 2018 | 32 Pages |
Abstract
We present the distribution of relaxation times (DRT) method applied to the electrical impedance spectrum data for improving the differentiation of biological tissues by means of two scenarios, a non-parametric representation and a parametric model. The complex electrical impedance from 1â¯kHz to 1â¯MHz was measured for ex-vivo WISTAR rat liver, heart, kidney, lung, muscle, and spleen tissues using a homemade electrical impedance spectroscopy (EIS) instrument and analyzed by the DRT method in a time constant domain revealing a particular non-parametric representation for differentiating each tissue using the retrieved distribution function. A larger number of relaxation time constants are found giving the possibility of studying the different polarization processes related to the tissues. We propose a parametric impedance model associated to DRT in the frequency domain to estimate the complex impedance of EIS measurements. Our results were compared with that obtained by the classical impedance Cole-Cole model.
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Authors
R.G. RamÃrez-ChavarrÃa, C. Sánchez-Pérez, D. Matatagui, N. Qureshi, A. Pérez-GarcÃa, J. Hernández-RuÃz,