Simultaneous analysis of thiols, sulphides and disulphides in wine aroma by headspace solid-phase microextraction-gas chromatography.
This paper deals with the improvement of a headspace solid-phase microextraction (HS-SPME) method, developed in a previous work, in order to analyse, simultaneously, thiols, sulphides and disulphides in wines. This can be achieved by applying Carboxen-polydimethylsiloxane fibres and a cryogenic trap to focus the analytes. Under optimum conditions, the HS-SPME procedure developed shows low limits of detection for the sulphides and disulphides studied (0.05-3 micrograms/l) and the thiols can also be analysed and detected at very low levels (0.5-1 microgram/l) with acceptable recoveries and repeatability.
Mestres
M
M
Departament de Química Analítica i Química Orgànica (Unitat d'Enologia, CeRTA), Facultat d'Enologia de Tarragona, Universitat Rovira i Virgili, Tarragona, Spain.
Martí
M P
MP
Busto
O
O
Guasch
J
J
D002849:Chromatography, Gas / Q000379:methods*; D004220:Disulfides / Q000032:analysis*; D015203:Reproducibility of Results; D013438:Sulfhydryl Compounds / Q000032:analysis*; D013440:Sulfides / Q000032:analysis*; D014835:Volatilization; D014920:Wine / Q000032:analysis*
D004220:Disulfides; D013438:Sulfhydryl Compounds; D013440:Sulfides