Organic gel or liquid chromatography method

A chromatography method wherein a gas, liquid or supercritical mobile phase containing species to be separated is circulated through a packing, said packing comprising:

• a plurality of capillary conduits extending in the packing between a so-called upstream face through which the mobile phase penetrates into the packing and a so-called downstream face through which the mobile phase exits the packing, and
• a continuous medium permeable to molecular diffusion extending between said conduits, including a porous organic gel or an organic liquid and including at least a network of connected pores for which the size is greater than twice the molecular diameter of at least one species to be separated and open on the conduits, so as to provide to said at least one species a diffusive path between said conduits,
• wherein the average molar flow rate of diffusion of the species to be separated between adjacent capillary conduits under an effect of a given concentration difference of said species between the walls of said capillary conduits is greater than 0.01 times the average molar flow rate of diffusion of the species between a capillary conduit and a stationary phase making up the packing under an effect of a same concentration difference of the species to be separated between a fluid conveyed by the capillary conduits and the wall of said capillary conduits.