SPE is an increasingly useful sample preparation technique. Itâs a method of sample preparation that concentrates and purifies analytes from solution by sorption onto a sorbent contained in either a disposable solid se cartridge or a 96-well plate, followed by elution of the analyte with a solvent and reconstitution into a mobile se that is appropriate for the instrumental method used for analysis.
SPE is divided into the following four categories, ion-exchange extraction, mixed mode, normal se extraction and reversed se extraction in the fields of agricultural and food, bio-analytical, environmental and forensic applications.