Microencapsulation and accelerated stability testing of bioactive compounds of Hibiscus sabdariffa
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ORIGINAL PAPER
Microencapsulation and accelerated stability testing of bioactive compounds of Hibiscus sabdariffa Liliana Cassol1 · Caciano Pelayo Zapata Noreña1 Received: 16 September 2020 / Accepted: 18 November 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The aim of this study was to encapsulate hibiscus aqueous extract, which has valuable content in anthocyanins with antioxidant activity. For this purpose, assays were realized using whey protein isolate and polydextrose and a mixture of both as carriers by spray-drying and freeze-drying encapsulation. Statistical analysis indicated that the powder containing only polydextrose by freeze-drying presented the best condition of encapsulation, with retentions of phenolic, anthocyanin and antioxidant activity measured by ABTS, DPPH, and HRSA of 86, 77, 76, 90 and 74%, respectively. Accelerated stability tests (75 and 90% relative humidity, at 40 and 60 °C) performed for 30 days in the powders, showed two periods of losses for polyphenols and antioxidant capacity: a significant decrease (p
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