SciELO - Scientific Electronic Library Online

 
vol.23 issue8Comparison of the n-alkanes and polycyclic aromatic hydrocarbons concentrations in the atmosphere during the preparation of warm and hot mixtures asphalt for pavementsA LED based photometer for solid phase photometry: zinc determination in pharmaceutical preparation employing a multicommuted flow analysis approach author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Journal of the Brazilian Chemical Society

Print version ISSN 0103-5053

Abstract

SERAFIM, Felipe A. T. et al. Quantitative chemical profile and multivariate statistical analysis of alembic distilled sugarcane spirit fractions. J. Braz. Chem. Soc. [online]. 2012, vol.23, n.8, pp. 1506-1514.  Epub Aug 09, 2012. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532012005000015.

Concentrations of 39 organic compounds were determined in three fractions (head, heart and tail) obtained from the pot still distillation of fermented sugarcane juice. The results were evaluated using analysis of variance (ANOVA), Tukey's test, principal component analysis (PCA), hierarchical cluster analysis (HCA) and linear discriminant analysis (LDA). According to PCA and HCA, the experimental data lead to the formation of three clusters. The head fractions give rise to a more defined group. The heart and tail fractions showed some overlap consistent with its acid composition. The predictive ability of calibration and validation of the model generated by LDA for the three fractions classification were 90.5 and 100%, respectively. This model recognized as the heart twelve of the thirteen commercial cachaças (92.3%) with good sensory characteristics, thus showing potential for guiding the process of cuts.

Keywords : sugarcane spirits; alembic fractions; multivariate analysis.

        · abstract in Portuguese     · text in English     · pdf in English