Modeling and experimental study on frequency-domain electricity properties of biological materials
Tian, H.; Luo, S.; Zhang, R.; Yang, G.; Huang, H.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 26(6): 1349-1352
2009
ISSN/ISBN: 1001-5515 PMID: 20095501 Document Number: 634929
Frequency-domain electricity properties of four objects, including bullfrog skin, bullfrog muscle, triply distilled water and 0.9% NaCl, were tested in the range of 100Hz-10MHz using home-made electrode and measuring system. The experimental results showed that the resistance of 0.9% NaCl decreased dramatically, that the amplitude frequency characteristics of bullfrog's muscle and skin were similar, but that of triply distilled water did not change significantly. The frequency dependence of 0.9% NaCl showed that the electrode had great influence on the measuring system, so a new equivalent circuit model based on the electrode system was needed. These findings suggest that the new five-parameter equivalent circuit model, which embodies considerations on the interaction between electrodes and tissues, is a reasonable equivalent circuit for studying the electrical characteristics of biological materials.