ArticleACS measurement science au2025
Broadband Complex Permittivity Spectra: Cole-Cole vs Circuit Models.
Article in ACS measurement science au, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Hydraulic properties such as porosity, water, and clay content can be inferred from electrical parameters like permittivity, conductivity, and resistivity. Spectral data enhance this analysis by revealing features such as pore size and clay type in wet particulate media. In liquid samples, electrode polarization is clearly observed, as orientational polarization occurs only at higher frequencies (MHz to sub-GHz). In contrast, particulate media exhibit electrode polarization artifacts that obscure spatial polarization peaks within the Hz-MHz range, especially in highly conductive materials like wet clayey soils, making the Cole-Cole model insufficient for distinguishing these effects. Therefore, a general circuit model using a parallel form of a resistor and a constant phase element configuration more effectively separates inherent material polarization from electrode polarization. The electrode polarization limiting frequency (
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