Full text
| |
| Author(s): |
Roni Vicente Reche
Total Authors: 1
|
| Document type: | Master's Dissertation |
| Press: | São Carlos. , gráficos, ilustrações, tabelas. |
| Institution: | Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) |
| Defense date: | 2006-09-28 |
| Examining board members: |
Douglas Wagner Franco;
Solange Cadore;
Fernando Valadares Novaes
|
| Advisor: | Douglas Wagner Franco |
| Field of knowledge: | Physical Sciences and Mathematics - Chemistry |
| Indexed in: | Banco de Dados Bibliográficos da USP-DEDALUS; Biblioteca Digital de Teses e Dissertações - USP |
| Location: | Universidade de São Paulo. Biblioteca do Instituto de Química de São Carlos; IQSC /T1873 |
| Abstract | |
Aiming at achieving typification of the paulista sugar-cane spirits, 35 compounds were analyzed in 107 samples collected in the State of São Paulo at the moment of distillation. The analytical results were obtained through multivariate analysis (chemometric), which was used to determine the best chemical discriminates in each type of the statistical analysis. Exploratory analyses (PCA, HCA and PLS) showed a distinction between the sugar-cane spirits distilled in stills and the ones distilled in continuous columns. After conducting LDA and CDA analyses, the resulting statistical models revealed a significantly high probability (95,0%) to correctly identify the system of distillation used in the process. Exploratory analyses performed in typical stills, typical columns and mixed stills showed good results for PCA and HCA only. No statistical models considering the three groups of drinks were created. The last phase of the present study involved exploratory analyses (PCA and HCA) performed in the 107 samples collected in the State of São Paulo. Considering the chemical characteristics of all samples, different groupings were found. However, a definitive correlation among these groups with the production areas in the State of São Paulo was not observed. (AU) | |