How is SPE conducted?
A polypropylene cartridge, packed with the appropriate solid phase, is placed in a vacuum apparatus and a water sample containing the analyte(s) of interest is drawn through the cartridge. The solid phase in the cartridge captures the analyte(s). A small quantity of solvent is then used to release the analytes (elution) from the solid phase. The extraction solvent may then be evaluated by an appropriate analytical instrument such as GC or HPLC.
