Abstract

MATURANO, Y.P. et al. Free volatile compounds of cv. Pedro Giménez (Vitis Vinifera L.) white grape must grown in San Juan, Argentina. S. Afr. J. Enol. Vitic. [online]. 2018, vol.39, n.1, pp.27-34. ISSN 2224-7904.  http://dx.doi.org/10.21548/39-1-1565.

The free aromatic composition of must from Pedro Giménez grapes, grown in San Juan, Argentina, was characterised. Samples from the vintages of 2008 and 2009 were analysed by gas chromatography-mass spectrometry-solid phase microextraction (GC-MS-SPME). Higher alcohols, terpenes, C₁₃-norisoprenoids, esters, aldehydes and ketones were quantified. The calculation of the odour activity values (OAVs) revealed that β-damascenone, α-ionone, β-linalool, geraniol, ethyl butanoate, hexanoate and octanoate were the most prevalent aroma-active compounds of the grape variety. However, the remaining 42 aromatic compounds that registered OAVs less than 1 could potentially contribute to the flavour of Pedro Giménez grapes. The measured monoterpene levels indicate that the Pedro Giménez grape can be considered a neutral variety. This is the first report describing the main potential free aroma contributors of Pedro Giménez grapes in two consecutive years.

Keywords : Aroma profile; grape must; Pedro Giménez; Argentina.

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