Study on the stability of β-carotene microencapsulated with pinhão (Araucaria angustifolia seeds) starch

• Published in: Carbohydrate polymers 2012-08, Vol.89 (4), p.1166-1173
• Main Authors: Spada, Jordana Corralo, Noreña, Caciano Pelayo Zapata, Marczak, Ligia Damasceno Ferreira, Tessaro, Isabel Cristina
• Format: Article
• Language: English
• Subjects: Applied sciences; Araucaria angustifolia; beta Carotene - chemistry; beta-carotene; Biological and medical sciences; Capsules; cluster analysis; coatings; color; Embryophyta - chemistry; Exact sciences and technology; Food industries; freeze drying; Fundamental and applied biological sciences. Psychology; glucose; Hydrolysis; Microencapsulation; multivariate analysis; Natural polymers; Physicochemistry of polymers; seeds; Seeds - chemistry; Stability; starch; Starch - chemistry; Starch and polysaccharides; Starch and starchy product industries; ultraviolet radiation; Weibull model; Weibull statistics; β-Carotene
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2012.03.090

► We extracted and modified pinhão starch by acid hydrolysis. ► The microcapsules were stored under different conditions. ► The different parameters were fitted using first-order kinetic and Weibull model. ► The microcapsules were more sensitive to ultraviolet light. ► The hydrolyzed starch promoted greater β-carotene stability. Native and hydrolyzed pinhão starches were used as coating materials for β-carotene microencapsulation by freeze-drying. The purpose of the present study was to evaluate the stability of β-carotene encapsulated under three different conditions: in the presence of ultraviolet light at 25±2°C, in the dark at 25±2°C and in the dark at 10.0±0.2°C. The color of the samples was also analyzed. Microcapsules prepared with native starch showed the lowest stability during storage. In contrast, microcapsules encapsulated with 12 dextrose equivalent (DE) hydrolyzed starch exhibited the highest stability. First-order kinetic and Weibull models were applied to describe the degradation of β-carotene over time. The R2 values of the Weibull model were greater than those of the first-order kinetic model. Moreover, multivariate analyses (principal component and cluster analyses) were also conducted.