Kinetics of L-Ascorbic Acid Degradation in Pineapple Drying under Ethanolic Atmosphere

Autor(es)

Santos, P. H. S. ^[1] ; Silva, M. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Chem Engn, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Drying Technology; v. 27, n. 9, p. 947-954, 2009.
• Citações Web of Science: 15

Resumo

The kinetics of L-ascorbic acid degradation during drying of pineapple in normal and modified atmosphere was studied. Drying experiments were carried out in a tunnel dryer at two drying temperatures and air velocities. The drying atmosphere was modified by the addition of ethanol (0.5%v/v). The presence of ethanol in the drying atmosphere promoted a more intense water evaporation compared to the conventional process. Although the L-ascorbic acid degradation rate during the pineapple drying (final moisture content of 27% wet basis) under ethanolic atmosphere was higher, these samples retained higher amounts of L-ascorbic acid. Moreover, the Weibull model was applied to fit the kinetics data. (AU)

• Processo FAPESP: 06/05282-0 - Estudo da cinetica de degradacao da vitamina c na secagem de abacaxi em atmosfera normal e modificada.
• Beneficiário: Paulo Henrique da Silva Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado