Effects of Spray-Drying Conditions on the Physicochemical Properties of Blackberry Powder

Author(s)

Ferrari, Cristhiane Caroline ^[1] ; Marconi Germer, Silvia Pimentel ^[1] ; de Aguirre, Jose Mauricio ^[1]

Affiliation

^[1] Inst Food Technol ITAL, Fruit & Vegetable Technol Ctr FRUTHOTEC, BR-13070178 Campinas, SP - Brazil

• Document type: Journal article
• Source: Drying Technology; v. 30, n. 2, p. 154-163, 2012.
• Web of Science Citations: 75

Abstract

The purpose of this work was to study the effects of spray-drying conditions on the physicochemical characteristics of blackberry powder using a central composite rotatable design. Inlet air temperature (140-180 degrees C) and maltodextrin concentration (5-25%) were employed as independent variables. Moisture content, hygroscopicity, anthocyanin retention, color, powder morphology, and particle size were analyzed. A higher inlet air temperature significantly increased the hygroscopicity of the powder, decreased its moisture content, and led to the formation of larger particles with smooth surfaces. Powders produced with higher maltodextrin concentrations were less hygroscopic, slightly lighter and less red, and had a lower moisture content. Anthocyanin retention was mainly affected by drying temperature due to the heat sensitivity of the pigment. The optimal processing conditions were an inlet air temperature of 140-150 degrees C and maltodextrin concentration of 5-7%. Overall, these results indicate that good quality powders can be obtained by spray drying, with potential applications for the food industry. (AU)

• FAPESP's process: 10/02561-1 - Physical Chemical Characterization and Evaluation of Stability of Blackberry Juice Powder Produced by Spray Drying
• Grantee: Cristhiane Caroline Ferrari
• Support Opportunities: Scholarships in Brazil - Post-Doctoral