Sources of error in tetrapolar impedance measurements on biomaterials and other ionic conductors
Sources of error in tetrapolar impedance measurements on biomaterials and other ionic conductors
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DOI：
10.1088/0022-3727/40/1/s02
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发表时间：
2007-01-07
影响因子：
3.4
通讯作者：
Martinsen, Orjan G.
中科院分区：
文献类型：
--
作者：
Grimnes, Sverre;Martinsen, Orjan G.
四极电极系统通常用于生物材料和其他离子导体的阻抗测量。通常认为它们不受电极极化阻抗的影响，并且在文献中几乎找不到关于使用四极电极系统时可能的陷阱或误差来源的信息。在本文中，我们表明，电极极化阻抗确实可以影响测量，也有其他现象，如负灵敏度区域，单独的电流路径和共模信号可能会严重破坏测量数据。
Tetrapolar electrode systems are commonly used for impedance measurements on biomaterials and other ionic conductors. They are generally believed to be immune to the influence from electrode polarization impedance and little can be found in the literature about possible pitfalls or sources of error when using tetrapolar electrode systems. In this paper we show that electrode polarization impedance can indeed influence the measurements and that also other phenomena such as negative sensitivity regions, separate current paths and common-mode signals may seriously spoil the measured data.