The present invention relates to an asymmetric chromatography media
suitable for separations applications, particularly as packed bed,
fluidized bed or magnetized bed chromatography media. In certain
embodiments, the asymmetric chromatography media comprises asymmetric
particles, preferably beads, having at least two distinct, controlled
pore size distributions. Preferably one of the distinct pore size
distributions is in an internal region of the particle, and the other is
in an external region or coating on the particle. These distinct pore
size distributions can be modified with uniform or alternatively unique
functional groups or mixtures of functional groups. The present invention
allows for the control over pore size distribution within an asymmetric
porous particle by providing a distinct internal region, preferably in
the form of a bead, and a distinct external region, preferably in the
form of a coating on the bead.