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An empirical scaling law for the real part of the frequency-dependent electrical conductivitσ′(ω) of brine-saturated porous materials in relation to its d.c. limit has been identified. This scaling law relates the conductivity as a function of frequency, porosity and salinity to a function of only one variable that is the ratio of the frequency to the d.c. conductivity in appropriate units. This result is very similar to what has been reported in hopping semiconducting systems.
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