ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Nguyen Phuoc Minh
Faculty of Food Science and Technology, Thu Dau Mot University, Binh Duong Province, Vietnam.
J Pure Appl Microbiol. 2020;14(4):2407-2416 | Article Number: 6731
https://doi.org/10.22207/JPAM.14.4.18 | © The Author(s). 2020
Received: 19/10/2020 | Accepted: 07/12/2020 | Published: 25/12/2020
Abstract

Roselle (Hibiscus sabdariffa) was a member of Malvaceae family. Its calyxes had bright red color due to presence of anthocyanin with an excellent antioxidant property. Raw roselle (Hibiscus sabdariffa L.) calyx was highly perishable due to its high moisture content. In order to diversify products from this plant, this research evaluated the possibility of spray drying for roselle extract into dried powder for long-term consumption. We focused on the effect of sugar alcohols (mannitol, sorbitol, isomalt, xylitol, erythritol) at 8%, carrier agents (maltodextrin, gum arabic, glutinous starch, whey protein concentrate, carboxymethyl cellulose) at 12%, operating parameters of spray dryer (inlet/outlet air temperature, feed rate) on physicochemical quality (bulk density, solubility, total phenolic content, total flavonoid content, anthocyanin content) of rosselle powder. Results showed that the optimal spray drying variables for rosselle powder should be 8% isomalt, 12% whey protein concentrate, inlet/ outlet air temperature 140/85oC/oC, feed rate 12 ml/min. Based on these optimal conditions, the highest physicochemical attributes of the dried roselle calyx powder would be obtained.

Keywords

Anthocyanin, carrier agent, operating parameter, physicochemical, Roselle calyx, sugar alcohol

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© The Author(s) 2020. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.