title: Static headspace analysis using polyurethane phases--application to roasted coffee volatiles characterization.
abstract: Static headspace sorptive extraction using polyurethane foams (HSSE(PU)) followed by gas chromatography coupled to mass spectrometry is proposed for volatile analysis. The application of this novel analytical approach to characterize the volatiles profile from roasted coffee samples, selected as model system, revealed remarkable advantages under convenient experimental conditions. The comparison of HSSE(PU) with other well-established procedures, such as headspace sorptive extraction using polydimethylsiloxane (HSSE(PDMS)) and headspace solid phase microextraction using carboxen/polydimethylsiloxane fibers (HS-SPME(CAR/PDMS)), showed that the former presented much higher capacity, sensitivity and even selectivity, where larger abundance and number of roasted coffee volatile compounds (e.g. furans, pyrazines, ketones, acids and pyrroles) could be achieved, under similar experimental conditions. The data presented herein proved, for the first time, that PU foams present great performance for static headspace sorption-based procedures, showing to be an alternative polymeric phase for volatile analysis.
authors.affiliation: University of Lisbon, Faculty of Sciences, Chemistry and Biochemistry Department and Centre of Chemistry and Biochemistry, Campo Grande, Ed. C8, 1749-016 Lisbon, Portugal.
authors.forename: C
authors.initials: C
authors.lastname: Rodrigues
authors.forename: F C M
authors.initials: FC
authors.lastname: Portugal
authors.forename: J M F
authors.initials: JM
authors.lastname: Nogueira
mesh_terms: D000327:Adsorption; D003069:Coffee / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D005663:Furans / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D007659:Ketones / Q000032:analysis; D011140:Polyurethanes / Q000737:chemistry*; D011719:Pyrazines / Q000032:analysis; D011758:Pyrroles / Q000032:analysis; D012680:Sensitivity and Specificity; D052617:Solid Phase Microextraction / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D003069:Coffee; D004129:Dimethylpolysiloxanes; D005663:Furans; D007659:Ketones; D011140:Polyurethanes; D011719:Pyrazines; D011758:Pyrroles; D055549:Volatile Organic Compounds; C013830:baysilon; C028279:polyurethane foam