Sampling carbonyl compounds with solid phase microextraction utilizing on-fiber derivatization
1998
Martos, P.A. | Pawliszyn, AJ.
Carbonyl compounds can be sampled with solid phase microextraction using on-fiber derivatization with o-(2,3,4,5,6-pentafluorobenzyl)-hydroxylamine (PFBHA) adsorbed onto poly(dimethylsiloxane)/divinyl benzene (PDMS/DVB) solid phase microextraction fibers. The products of the reactions are oximes that are thermally very stable; insensitive to light; and can be analyzed by gas chromatography, with FID or other detectors, or HPLC with ultraviolet/visible detection. Loading PFBHA on PDMS/DVB fibers is simple, highly reproducible, and reversible; more than 200 loading, sampling, and analysis steps are possible with one fiber. Formaldehyde was used as a model carbonyl compound to study the viability of the new sampling system. This sampling system provides specificity for carbonyl compounds and requires short sampling times. It has the potential to be an excellent analytical tool for sampling short-lived carbonyl-containing aroma compounds and as a routine sampling method for volatiles from various matrices, such as foods and fragrances.
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