Characterization of Roselle calyx from different geographical origins

TY - JOUR

T1 - Characterization of Roselle calyx from different geographical origins

AU - Juhari, Nurul Hanisah Binti

AU - Bredie, Wender L.P.

AU - Toldam-Andersen, Torben

AU - Petersen, Mikael Agerlin

PY - 2018

Y1 - 2018

N2 - Roselle (Hibiscus sabdariffa L.) is considered an underexploited food crop with nutritional and large scale processing potential. Roselle can be utilized as a functional food, mainly due to being rich in vitamin C, anthocyanins, other phytochemicals, and natural color. Although Roselle has been widely planted and consumed, little is known about the composition of aroma profiles. In this study, seventeen samples of dried Roselle calyx were collected from eight countries and the aroma profiles were determined by dynamic headspace sampling and GC–MS and GC-olfactometry. Furthermore, total soluble solids, pH, and color L* a* b* were determined, and sugars and acids were measured using ion chromatography. There were significant (p < 0.05) differences in all measured variables in physicochemical properties and non-volatile compounds. A total of 135 volatiles were identified mainly terpenes, aldehydes, esters, furans, and ketones. Thirty-seven odorants were reported as potentially important aroma compounds based on GC-olfactometry. This study provides valuable information for future commercial utilization of Roselle in the food industry.

AB - Roselle (Hibiscus sabdariffa L.) is considered an underexploited food crop with nutritional and large scale processing potential. Roselle can be utilized as a functional food, mainly due to being rich in vitamin C, anthocyanins, other phytochemicals, and natural color. Although Roselle has been widely planted and consumed, little is known about the composition of aroma profiles. In this study, seventeen samples of dried Roselle calyx were collected from eight countries and the aroma profiles were determined by dynamic headspace sampling and GC–MS and GC-olfactometry. Furthermore, total soluble solids, pH, and color L* a* b* were determined, and sugars and acids were measured using ion chromatography. There were significant (p < 0.05) differences in all measured variables in physicochemical properties and non-volatile compounds. A total of 135 volatiles were identified mainly terpenes, aldehydes, esters, furans, and ketones. Thirty-seven odorants were reported as potentially important aroma compounds based on GC-olfactometry. This study provides valuable information for future commercial utilization of Roselle in the food industry.

KW - Dynamic headspace sampling

KW - Gas chromatography-olfactometry

KW - Gas chromatography–mass spectrometry

KW - Hibiscus sabdariffa L.

KW - Physicochemical properties

U2 - 10.1016/j.foodres.2018.06.049

DO - 10.1016/j.foodres.2018.06.049

M3 - Journal article

C2 - 30131149

AN - SCOPUS:85049323334

SN - 0963-9969

VL - 112

SP - 378

EP - 389

JO - Food Research International

JF - Food Research International

ER -