Abstract
The polarisation impedance of the platinum electrode was measured in physiological saline (0·9% NaCl) over six decades of frequencies down to 1 mHz. The applicability, of Fricke’s phase angle rule was verified down to 10 mHz. The resistive shunt which emerges at lower frequencies was shown to be equivalent to the direct current (d.c.) impedance of the interface. A Cole-Cole (1941) type of relaxation model is proposed to describe the interface behaviour over all frequency ranges. Nonlinear polarisation measurments have demonstrated the validity of Schwan’s limit law of linearity at very low frequencies.
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Onaral, B., Schwan, H.P. Linear and nonlinear properties of platinum electrode polarisation. Part 1: frequency dependence at very low frequencies. Med. Biol. Eng. Comput. 20, 299–306 (1982). https://doi.org/10.1007/BF02442796
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DOI: https://doi.org/10.1007/BF02442796