Two electrical models made-up with only two elements (a resistor and a capacitor) were compared. The series model was found better than the parallel one both, in precision (volume fraction distinction) and extent of operating conditions (wider range of frequency), as contrasted to experimental data.

The cryogel Q – C was characterized before and after of the Cu2+adsorption, using SEM – EDX Analysis, FTIR – ATR and XPS techniques. The results showed that the cryogel Q - C is a macroporous material and due also to the fact of functional groups: -OH and NH2- in its structure, the cryogel can have environmental applications.

The most important features of the experimental behavior at low frequencies are well represented by the simple series model that follows the general trend of the experimental measurements. In this interval the parallel model presents a resistive behavior that is not consistent with experimental observations.

While the parallel model presents insensitivity to the gas volume fraction at higher frequencies than 100 Hz, the series model is sensitive to changes in computed volume fraction.