Fast Analysis of Environmental Samples, Using Solid-Phase Microextraction (SPME)

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Courtesy of Sigma-Aldrich Co., LLC

Solid Phase MicroExtraction (SPME) is an alternative to conventional sample extraction techniques. In SPME, analytes establish an equilibrium between the sample matrix and a stationary phase coated on a fused silica fiber (Figure A). The fiber is thermally desorbed in the injection port of the GC, which transfers the analytes into the capillary column. Because no solvent is injected, and the analytes are rapidly desorbed onto the column, short, narrow bore columns can be used. This greatly reduces analysis time and lowers minimum detection limits, while maintaining resolution specifications. The technique will be shown in use for sample screening or as an alternative quick turn around method (QTM).

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