Distinção entre cachaças destiladas em alambiques e em colunas usando quimiometria

AUTOR(ES)

Reche, Roni Vicente, Franco, Douglas Wagner

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2009

RESUMO

One hundred fifteen cachaça samples derived from distillation in copper stills (73) or in stainless steels (42) were analyzed for thirty five itens by chromatography and inductively coupled plasma optical emission spectrometry. The analytical data were treated through Factor Analysis (FA), Partial Least Square Discriminant Analysis (PLS-DA) and Quadratic Discriminant Analysis (QDA). The FA explained 66.0% of the database variance. PLS-DA showed that it is possible to distinguish between the two groups of cachaças with 52.8% of the database variance. QDA was used to build up a classification model using acetaldehyde, ethyl carbamate, isobutyl alcohol, benzaldehyde, acetic acid and formaldehyde as chemical descriptors. The model presented 91.7% of accuracy on predicting the apparatus in which unknown samples were distilled.

Documentos Relacionados

• Comparação do perfil químico entre cachaças de um mesmo vinho destiladas em alambiques e em colunas
• Distinção entre consciência e matéria
• Compostos nitrogenados em bebidas destiladas: cachaça e tiquira
• Vieira em movimento: subjacências da distinção entre tapuias, tupis e negros
• A (in)distinção entre dialogismo e intertextualidade