Comportamento da beta-ciclodextrina adicionada ao leite de cabra submetido ao processo de desidratação por "spray-dryer"

Abstract

This work evaluated the effect of the encapsulant agent b-cyclodextrin (b-CD) added the goat milk submitted to the spray-dryer dehydration process, through thermogravimetric analysis and gas cromatography. After dehydration, the sample added of b-CD presented a real yield of 10,59%, with a loss rate of 0,04% (in relation to the expected theoretical value 10,6%); while in the sample without addition of the encapsulant agent the real yield was 9,57%, with a loss rate of 4,27% (expected theoretical value 10% ). It was verified that the volatilization of 44% and 21% of the commercial acids C8 and C10 , respectively, through the thermogravimetric analysis (TGA). The cromatographic results showed losses of approximately 30% of the C8 acids and 20% of the C10 acids, in samples of goat milk without b-CD, in relation to the samples with b-CD. These percentages corroborate the values estimated for commercial acids. On the basis of these studied parameters, we can infer that there is a minor loss of the fatty acids C8 and C10 in the sample of goat milk with b-CD, probably due to the encapsulant effect, which increase the thermal stability of the acids.