Each adsorbate diffusing into or out of the MOF layer contributes to the transient sensor signal. The kinetic selectivity sensing concept is based on deconvoluting the signal contributions of VOCs that diffuse at different rates and identifying these compounds based on their characteristic diffusivities in the MOF. For this approach to work, no interactions between the diffusing molecules should occur, as this would affect their diffusivity values. In other words, the sensor signal measured in a mixed atmosphere should be the sum of the single-analyte signals measured at the corresponding concentrations. To illustrate that this condition is met at the low concentrations relevant for sensing, binary mixtures (acetone-hexane and 1-propanol-1-butanol) were studied. Bi-exponential fits of the desorption transients measured in these mixed atmospheres demonstrated that the signal could be described as the sum of two singleanalyte signals (Fig. ) and yielded ∆' /' ! and diffusivity values close to those obtained from single-component measurements at the same concentrations (Fig. ).