LiChrospher® Si 60 is a versatile HPLC spherical silica sorbent with a pore diameter of 60A and a particle size of 5µm for normal phase chromatography: This sorbent is packed into LiChroCART® 4-4 HPLC guard columns, to be used in connection with LiChroCART® HPLC cartridges, packed with LiChrospher® Si 60 (5µm or 10µm). The connection is being accomplished by use of the manu-CART® NT cartrige holder (1.51486).