SPE columns, Supra-Clean® Florisil (FL-S) Pesticide grade. Supplier: PERKIN ELMER GC-INSTRUMENTS. Description: Supra-Clean® Florisil Pesticide (FL-S) SPE columns are recommended for extracting polar compounds when analysing pesticides. ,PERCN9306517EA,PERCN9306436EA,PERCN9306443EA,PERCN9306516EA,PERCN9306470EA,PERCN9306447EA,PERCN9306400EA.