Using headspace solid phase micro-extraction for analysis of aromatic compounds during alcoholic fermentation of red wine

Timely monitoring of changes in the type and quantity of aromatic compounds throughout the must fermentation process provides useful information for wine makers. This paper aimed to use headspace solid phase micro-extraction coupled with gas chromatography (HS-SPME/GC-MS) to analyse aromatic compounds produced during must alcoholic fermentation. The results showed that both qualitatively and quantitatively, the PDMS/CAR/DVB fibre was suitable for extracting aromatic compounds in wine. The amount of alcohols, esters, acids and monoterpenes absorbed on the SPME fibre were influenced by the ethanol content. Calibration curves with a high correlation (R-2 > 0.900) obtained in seven ethanol contents (2%, 4%, 6%, 8%, 10%, 12% and 14%) were established to quantitatively determine the amount of aromatic compounds during alcoholic fermentation. A validated HS-SPME method for determining aromatic compounds was used to monitor aromatic compounds during Syrah alcoholic fermentation. This modified HS-SPME method was proved to be useful for controlling the oenological process.