Resumo

SOARES, Bruno; GARCIA, Raquel; FREITAS, Ana Maria Costa  e  CABRITA, Maria João. Phenolic compounds released from oak, cherry, chestnut and robinia chips into a synthetic wine: influence of toasting level. Ciência Téc. Vitiv. [online]. 2012, vol.27, n.1, pp.17-26. ISSN 0254-0223.

Advantages and drawbacks from the use of oak chips in oenology are well documented; wood oenological value is primarily related to cooperage potential, and not addressed from the oenologist view; for this reason other woods did not had similar attention. Polyphenols release is determinant to recognize the oenological value. Untoasted, light, medium and heavy toasted chips from oak, cherry, robinia and chestnut woods were add, to a model wine solution. Total polyphenolic content using Folin Ciocalteau reagent, absorbance at 280nm, identification and quantification of low molecular weight phenolic compounds were determined. Oak and chestnut released high amounts of phenolic compounds whilst cherry presented different behaviour. Robinia had the poorest performance, regarding low molecular weight phenolic compounds; the high values of absorbance and total polyphenolic found suggest the release of different phenolics. To our knowledge, this is the first study reporting toasting influence on the release of phenolic compounds from other kinds of wood species than oak.

Palavras-chave : oak; chestnut; robinia; cherry; toasting level; phenolic compounds.

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