Constituintes químicos e teor de extrato aquoso de cafés arábica (coffea arabica l.) e conilon (coffea canephora pierre) torrados

Abstract

The objective of this work was to quantify and to characterize the chemical composition of arabic and robust coffees of diferent crops and its effects in the quality of the toasted coffee. Arabic grains of coffee (Coffea arabic L.) of the crops 88/89 and 2000 coming from the south region of Minas Gerais state and the coffee conilon (Coffea canephora Pierre) crop 2000, coming from Espírito Santo state were used. It was prepared a blend in the proportion of 70% arabic and 30% of conilon. The coffees were toasted (medium commercial), milled and submitted to physiochemical analyses of moisture ethereal extract, gross protein, totals phenolics, total acidity titled, pH, total soluble solids, aqueous extract, total and non reducing sugars. The results showed that, the total acidity titled and the pH did not presented significant differences which indicates homogeneity among the appraised coffees. The arabic coffee crop 88/89 presented larger contents of ethereal extract, indicating a larger degradation in this coffee probably due to the greater period of storage. The total sugars content and aqueous extract did not present differences among the studied coffees, while the non reducing sugars of the arabic coffee crop 88/89 presented the smallest contents and differing from the other coffees.