This is a 1-day special topics course on solid-phase microextraction (SPME) that will be held twice a year. SPME is a solvent-free sample preparation technique used for extracting volatile and semi-volatile analytes for analysis by GC. SPME involves the use of a special fibre coated with either a liquid or a solid phase. The quantity of analyte extracted by the fibre is proportional to the quantity of analyte in the sample. After extraction, the SPME fibre is transferred and injected into a GC, where the analyte is desorbed and the analysis is complete.