"Compostos fenólicos em madeiras brasileiras" / "Phenolics compounds in brazilian woods"

AUTOR(ES)

Alexandre Ataide da Silva

DATA DE PUBLICAÇÃO

2006

RESUMO

Maturation in oak barrels is an important widely spread pratice in the production of a high quality spirit. However, despite the biodiversity in Brazil, the cachaça aging in wodden barrels is not a commun pratice. The use mostly imported oak barrels for the cachaça maturation process. This producers barrel had been usual maturation previously for wine, cognac, and whisky aging in Europe and North America. The aiming to present alternative to oak the present work report the phenolics profile of cachaça extracts of Brazilian wood species in comparation with oak. A HPLC method was used for the simultaneous analysis of 16 phenolic compounds of importance for the flavor and aroma of aged spirits. The chromatographic separations were carried out using a Shimadzu C18 column (2 mm x 3μm x 250 mm) with for elution gradient. The eluting compounds were monitored at their specific maximum of absorption through a diode array spectrophotometric detector with exception of catechin and epicatechin which were probed using a spectrofluorometric detector with emission set at 280 nm and excitation at 313 nm. Follow 16 phenolics compounds have been analisys: ( gallic acid, (+)cathechin, vanillic acid, vanilin, (-)epicathechin, seringic acid, seringaldehyde, escopoletin, coumarin, sinapaldehyde, coniferaldehyde, trans-resveratrol, ellagic acid, mirecetin, quercetin and the eugenol) in cachaça extracts of different wood species. The major phenolic compounds identified and quantified are vanillc acid (medium 0.18 mg/L), seringaldehyde (medium 0.048 mg/L) and vanillin (medium 0.47 mg/L). The coumarin is on higher concentration in Brazilian wood extract then in oak the levels of the supracited compounds. In oak samples with medium values of 0.0054 mg/L and 1.2 mg/L for oak and Brazilian wood species respectively. Furthemore, the presence of phenolics were Abstract IQSC-USP iv investiged in cachaça, rum, and whisky revealing seringaldehyde and vanillin as the major components.

ASSUNTO(S)

compostos fenólicos cachaça phenolics compounds cachaça brazilian woods madeiras brasileiras

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