For diffusion coefficients, the correlation proposed by has been uti-lized in perfume engineering, specifically within the perfume diffusion model as cited in studies by . The authors assert that this model offers satisfactory accuracy when applied to volatile compounds diffusing through air. The correlation has grounds in the hard-sphere model from the Chapman-Enskog equation . However, proposed an improved form of the equation that contains parameters to be identified from experimental data, i.e., from a data set D D i,j ,P,T = {(D 1,j , P 1 , T 1 ), (D 2,j , P 2 , T 2 ), ...., (D N,j , P N , T N ))}, where D i,j is given by: