In addition to discriminating between VOCs, their concentrations could be quantified based on the amplitudes extracted from the capacitance transients (∆' /' ! ). Whereas a single isotherm describes the response of an equilibrium-based sensor, the amplitude measured by a kinetic selectivity sensor depends on the difference between the two isotherms at the initial and final temperatures of the thermal perturbation (Fig. ). Because these two isotherms diverge in the low-concentration region, the measured amplitude is concentration-dependent (Fig. ). Hence, once a VOC is identified, the relationship between the measured amplitude and the atmospheric concentration enables the quantification of the latter. Since this relationship is determined by the adsorption properties of the MOF layer, the sensor amplitude output can be modeled by a mathematical description of the VOC isotherm and its temperature dependence (see Methods). This approach enables the prediction of (∆' /' ! values for different temperature steps (Fig. ) and works irrespective of the VOC dielectric constant or polarity (Fig. ).