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Physicochemical Properties and Oxidative Storage Stability of Milled Roselle (Hibiscus sabdariffa L.) Seeds

1
Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, Frederiksberg C, DK-1958, 1165 København, Denmark
2
Department of Food Service and Management, Faculty of Food Science and Technology, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
*
Author to whom correspondence should be addressed.
Molecules 2018, 23(2), 385; https://doi.org/10.3390/molecules23020385
Received: 3 January 2018 / Revised: 8 February 2018 / Accepted: 11 February 2018 / Published: 11 February 2018
(This article belongs to the Section Natural Products Chemistry)
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Abstract

Milled Roselle (Hibiscus sabdariffa L.) seeds of the UMKL cultivar were analyzed for proximate composition, water and oil absorption capacity, and the influence of storage conditions on storage stability. The storage stability was determined under four types of conditions: light/oxygen (air) (LO), light/nitrogen (LN), darkness/oxygen (air) (DO), and darkness/nitrogen (DN) while monitoring for seven consecutive months. During the storage period, the formation of volatiles was determined using dynamic headspace sampling and Gas Chromatography-Mass Spectrometry (GC-MS) analysis. In total, 85 volatiles were identified, mainly aldehydes, alcohols, ketones, furans, and acids indicating lipid oxidation. It is recommended that milled Roselle seeds should be flushed with nitrogen and stored in darkness. Under these conditions, the seeds can be stored for at least three months without changes in volatile profile. This is important to ensure the good quality of milled Roselle seeds for further commercialization. View Full-Text
Keywords: Roselle seeds; storage stability; gas chromatography–mass spectrometry; volatile compounds; principal component analysis; physicochemical properties Roselle seeds; storage stability; gas chromatography–mass spectrometry; volatile compounds; principal component analysis; physicochemical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Juhari, N.H.; Petersen, M.A. Physicochemical Properties and Oxidative Storage Stability of Milled Roselle (Hibiscus sabdariffa L.) Seeds. Molecules 2018, 23, 385.

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