Elucidation of key odorants in Beninese Roselle (Hibiscus sabdariffa L.) infusions prepared by hot and cold brewing

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dc.authoridKelebek, Hasim/0000-0002-8419-3019
dc.authoridselli, serkan/0000-0003-0450-2668
dc.authoridZANNOU, Oscar/0000-0003-1227-1265
dc.contributor.authorZannou, Oscar
dc.contributor.authorKelebek, Haşim
dc.contributor.authorSelli, Serkan
dc.date.accessioned2025-01-06T17:44:17Z
dc.date.available2025-01-06T17:44:17Z
dc.date.issued2020
dc.description.abstractRoselle (Hibiscus sabdariffa L.) is an edible flower belonging to the large family of Malvaceae. Aroma is one of the crucial parameters to determine the final tea overall quality and the consumer's preference and it is affected by different processing factors (drying, heating, brewing etc.). The aim of this study was to compare hot and cold brewing procedures on the aroma and aroma-active compounds of Beninese Roselle for the first time. Three different infusions were prepared and coded as R16M (16 min/98 degrees C), R40M (40 min/98 degrees C) and R24H (24 h/at ambient temperature). The aroma compounds of the infusion samples were extracted by liquid liquid extraction (LLE) method and determined by gas chromatography-mass spectrometry (GC-MS). A total of 38, 38 and 39 aroma compounds including alcohols, furans, acids, ketones, aldehydes, volatile phenols, lactones, pyranone, pyrrole, terpene and ester were detected in R16M, R40M and R24H infusions, respectively. The total aroma concentration of the cold infusion sample (R24H) was higher than those of two hot infusions. A significant reduction was found in the amount of these compounds in the sample prepared by hot infusion with 16 min (R16M). In all three samples, furans were identified as the dominant aroma group followed by alcohols. Based on the results of the aroma extract dilution analysis (AEDA), a total of 22 and 23 different key odorants were detected in hot infusions (R16M and R40M) and cold infusion (R24H) (ambient temperature), respectively. The powerful key odorants with regard to FD (flavor dilution) factors in all samples were prevailingly furans, alcohols, and aldehydes. The highest FD factors were found in furfural and 5-methyl-2-furfural providing caramel and bready notes. Principal component analysis (PCA) showed that Roselle infusions could clearly be discriminated in terms of their aroma profiles. The findings of this study demonstrate that the brewing procedures have a important impact on the final aroma and key odorants of Roselle infusions.
dc.description.sponsorshipCukurova University Research Fund [FYL-2017-8664]
dc.description.sponsorshipThis research was funded by the Cukurova University Research Fund (Grant number: FYL-2017-8664). The authors sincerely thank MSc Gamze Guclu for GC-MS-O analysis. We also wish to thank Assoc. Prof. Dr. Muharrem Keskin from Hatay Mustafa Kemal University-Turkey for their outstanding editing and proof reading. The authors have noconflict of interest to declare.
dc.identifier.doi10.1016/j.foodres.2020.109133
dc.identifier.issn0963-9969
dc.identifier.issn1873-7145
dc.identifier.pmid32466910
dc.identifier.scopus2-s2.0-85081039994
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.foodres.2020.109133
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2977
dc.identifier.volume133
dc.identifier.wosWOS:000536130000016
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofFood Research International
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectRoselle
dc.subjectHibiscus sabdariffa
dc.subjectInfusion
dc.subjectAroma-active
dc.subjectGC-MS-O
dc.titleElucidation of key odorants in Beninese Roselle (Hibiscus sabdariffa L.) infusions prepared by hot and cold brewing
dc.typeArticle

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