4 documents found, page 1 of 1
Determination of Target Pesticide Residues in Tropical Fruits Employing Matrix ...
Freitas,Silvia S.; Serafim,Felipe A. T.; Lanças,Fernando M.A simple method based on matrix solid-phase dispersion (MSPD) extraction and gas chromatography with electron-capture detection (GC-ECD) is employed to determine pesticide residues in the following tropical fruits: banana, mango, melon, papaya and pineapple. In the MSPD proposed method, C18, silica gel and ethyl acetate presented the best results in the extraction, clean-up and elution steps, respectively. Spik...
Evaluation of Glycerol Profiles in Sugarcane Spirits (Cachaças)
Garcia,André C.; Serafim,Felipe A. T.; Keukeleire,Denis De; Franco,Douglas W.A new method for glycerol quantification in sugarcane spirits (cachaças) is proposed, based on sample derivatization using benzoyl chloride followed by solid-phase extraction and high performance liquid chromatography with diode array detection analysis. The limits of detection and quantification for glycerol analysis are 0.25 mg L−1 and 0.74 mg L−1, respectively. The accuracy is of 97.5%, the precision 93.5% a...
Correlation between chemical composition and sensory properties of Brazilian su...
Serafim,Felipe A. T.; Seixas,Fernanda R. F.; Da Silva,Alexandre A.; Galinaro,Carlos A.; Nascimento,Eduardo S. P.; Buchviser,Silmara F.; Odello,LuigiThe correlation between the chemical composition and the sensory data for 28 cachaça samples was investigated using principal component analysis (PCA). A chemical model was then developed using linear discriminant analysis (LDA) to classify the distillate samples according to their sensory qualities. This model presented predictive abilities of calibration and validation of 87.4 and 100%, respectively, and was ...
Quantitative chemical profile and multivariate statistical analysis of alembic ...
Serafim,Felipe A. T.; Galinaro,Carlos A.; Silva,Alexandre A. da; Buchviser,Silmara F.; Nascimento,Eduardo S. P. do; Novaes,Fernando V.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 t...