LiChrolut® columns are designed for reliable and rapid solid phase extraction. This is achieved by using strong but reversible interactions between the analyte and the surface of the stationary phase. A variety of surface modifications allow non-polar extractions (LiChrolut® RP18 and RP18e), polar extractions (LiChrolut® Si and LiChrolut® CN), Cation Exchange extraction (LiChrolut® SCX), mixed mode extraction (LiChrolut® TSC) and non-polar extractions on a polymer phase (LiChrolut® EN) which is especially well suited for the extraction of pesticdes and phenols in water or drugs in body fluids.