Up to now, Exafs analysis of heterogeneous catalysts has been made usi
ng the free electron single scattering model. Coordination numbers and
interatomic distances were extracted according to the classical Exafs
formula which relates modulations of the absorption coefficient and s
tructural parameters. In this work, we try to consider multiple scatte
ring in the analytical procedure in order to obtain a mom precise stru
ctural description of the material at the first step of the preparatio
n i.e. the impregnation-drying.