Researchers from the University of Waterloo (Waterloo, Canada) designed and constructed a cold fiber solid-phase microextraction (SPME) device and applied it to the analysis of off flavors in a rice sample. The device was based on thermoelectric cooling via a three-stage thermoelectric cooler that cooled a copper rod coated with a poly(dimethylsiloxane) hollow fiber that served as the SPME fiber. They examined three compounds in the rice: hexanal, nonanal, and undecanal, which were identified by retention times in a gas chromatography–flame ionization detection system. The cooled fiber device reportedly resulted in better reproducibility and shorter analysis time compared with a conventional solvent extraction method.

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Researchers from the University of Waterloo (Waterloo, Canada) designed and constructed a cold fiber solid-phase microextraction (SPME) device and applied it to the analysis of off flavors in a rice sample.