Journal article published in Food Chemistry, volume 219, pp. 346–356.

Authors: Delia Elena Urcan, Simone Giacosa, Fabrizio Torchio, Susana Río Segade, Stefano Raimondi, Marta Bertolino, Vincenzo Gerbi, Nastasia Pop and Luca Rolle.

Abstract

The impact of postharvest dehydration on the volatile composition of Malvasia moscata grapes and fortified wines produced from them was assessed. The ripeness effect of fresh grapes on volatile compounds of dehydrated grapes was evaluated for the first time in this study. Fresh grape berries were densimetrically sorted, and more represented density classes were selected. Dehydration of riper berries (20.5 ºBrix) led to volatile profiles richer in terpenes, particularly linalool and geraniol. The effect of dehydration rate on the volatile composition of dehydrated grapes and fortified wines was also evaluated. Fast dehydration grapes were richer in total free terpenes, and the resulting wines contained greater amounts of volatile compounds. The predominant compounds were free esters, but linalool, rose oxide, citronellol and geraniol can also contribute to wine aroma, particularly for fast dehydration. β-damascenone can be an active odorant, although its contribution was greater in wines made from slow dehydrated grapes.

Key words berry density, fortified wines, postharvest dehydration, terpenes, volatile compounds, wine grapes

BibTeX entry: click to show

@article{
	2318_1606017,
	url = {https://hdl.handle.net/2318/1606017},
	author = {Urcan, Delia Elena and Giacosa, Simone and Torchio, Fabrizio and Río Segade, Susana and Raimondi, Stefano and Bertolino, Marta and Gerbi, Vincenzo and Pop, Nastasia and Rolle, Luca},
	title = {‘Fortified’ wines volatile composition: Effect of different postharvest dehydration conditions of wine grapes cv. Malvasia moscata (Vitis vinifera L.)},
	year = {2017},
	journal = {Food Chemistry},
	volume = {219},
	abstract = {The impact of postharvest dehydration on the volatile composition of Malvasia moscata grapes and fortified wines produced from them was assessed. The ripeness effect of fresh grapes on volatile compounds of dehydrated grapes was evaluated for the first time in this study. Fresh grape berries were densimetrically sorted, and more represented density classes were selected. Dehydration of riper berries (20.5 ºBrix) led to volatile profiles richer in terpenes, particularly linalool and geraniol. The effect of dehydration rate on the volatile composition of dehydrated grapes and fortified wines was also evaluated. Fast dehydration grapes were richer in total free terpenes, and the resulting wines contained greater amounts of volatile compounds. The predominant compounds were free esters, but linalool, rose oxide, citronellol and geraniol can also contribute to wine aroma, particularly for fast dehydration. β-damascenone can be an active odorant, although its contribution was greater in wines made from slow dehydrated grapes.},
	keywords = {berry density, fortified wines, postharvest dehydration, terpenes, volatile compounds, wine grapes},
	doi = {10.1016/j.foodchem.2016.09.142},	
	pages = {346--356}
}

Publication availability