Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification

Hibiscus sabdariffa is a multi-cropping system endowed with wide ranges of benefits to humans. Being a plant rich in phenolic compounds, the process intensification of extraction method used for recovering the phenolic compounds from this essential plant is inevitable to easily proffer keen informat...

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Main Authors:	Alara, Oluwaseun Ruth, Nour, A. H.
Format:	Article
Language:	English
Published:	Elsevier Ltd 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/25851/ http://umpir.ump.edu.my/id/eprint/25851/ http://umpir.ump.edu.my/id/eprint/25851/ http://umpir.ump.edu.my/id/eprint/25851/7/Microwave-assisted%20extraction%20of%20phenolics%20from%20Hibiscus%20sabdariffa1.pdf

id	ump-25851
recordtype	eprints
spelling	ump-258512019-10-03T08:01:03Z http://umpir.ump.edu.my/id/eprint/25851/ Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification Alara, Oluwaseun Ruth Nour, A. H. TP Chemical technology Hibiscus sabdariffa is a multi-cropping system endowed with wide ranges of benefits to humans. Being a plant rich in phenolic compounds, the process intensification of extraction method used for recovering the phenolic compounds from this essential plant is inevitable to easily proffer keen information on the extraction behaviours. Thus, the process intensification and kinetic behaviour of microwave-assisted extraction (MAE) for recuperating total phenolics (TP) content from H. sabdariffa calyces were investigated. The impacts of MAE factors such as solid/sample ratio, microwave power and temperature at varied irradiation time were studied. The effective diffusivity was also estimated. In addition, the extract was characterized to tentatively assign the phenolics using Liquid chromatography tandem mass spectrometry of quadrupole time-of-flight (LC-ESI-MS-MS). The achieved results clearly indicated that the MAE process intensification was acheived with TP content of 70.53 mg GAE/g extract in 3 min at solvent/sample ratio of 14:1 mL/g, microwave power of 500 W and 60 °C of temperature where the highest effective diffusivity coefficient was obtained. Out of the two considered kinetic models (second-order rate and power law), the second-order rate model best describes the MAE process intensification with higher coefficients of determination (R2 > 0.99). Moreover, an aggregate of 77 phenolic compounds was assigned in the extract of H. sabdariffa calyx; signifying the wider potentials of the extract industrially. Thus, this study clearly outlined that H. sabdariffa calyx is an embodiment of diverse phenolic compounds; indicating its potential in pharmaceutical and food industries. Elsevier Ltd 2019-05-28 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/25851/7/Microwave-assisted%20extraction%20of%20phenolics%20from%20Hibiscus%20sabdariffa1.pdf Alara, Oluwaseun Ruth and Nour, A. H. (2019) Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification. Industrial Crops and Products, 137. pp. 528-535. ISSN 0926-6690 https://doi.org/10.1016/j.indcrop.2019.05.053 https://doi.org/10.1016/j.indcrop.2019.05.053
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Alara, Oluwaseun Ruth Nour, A. H. Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
description	Hibiscus sabdariffa is a multi-cropping system endowed with wide ranges of benefits to humans. Being a plant rich in phenolic compounds, the process intensification of extraction method used for recovering the phenolic compounds from this essential plant is inevitable to easily proffer keen information on the extraction behaviours. Thus, the process intensification and kinetic behaviour of microwave-assisted extraction (MAE) for recuperating total phenolics (TP) content from H. sabdariffa calyces were investigated. The impacts of MAE factors such as solid/sample ratio, microwave power and temperature at varied irradiation time were studied. The effective diffusivity was also estimated. In addition, the extract was characterized to tentatively assign the phenolics using Liquid chromatography tandem mass spectrometry of quadrupole time-of-flight (LC-ESI-MS-MS). The achieved results clearly indicated that the MAE process intensification was acheived with TP content of 70.53 mg GAE/g extract in 3 min at solvent/sample ratio of 14:1 mL/g, microwave power of 500 W and 60 °C of temperature where the highest effective diffusivity coefficient was obtained. Out of the two considered kinetic models (second-order rate and power law), the second-order rate model best describes the MAE process intensification with higher coefficients of determination (R2 > 0.99). Moreover, an aggregate of 77 phenolic compounds was assigned in the extract of H. sabdariffa calyx; signifying the wider potentials of the extract industrially. Thus, this study clearly outlined that H. sabdariffa calyx is an embodiment of diverse phenolic compounds; indicating its potential in pharmaceutical and food industries.
format	Article
author	Alara, Oluwaseun Ruth Nour, A. H.
author_facet	Alara, Oluwaseun Ruth Nour, A. H.
author_sort	Alara, Oluwaseun Ruth
title	Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
title_short	Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
title_full	Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
title_fullStr	Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
title_full_unstemmed	Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
title_sort	microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification
publisher	Elsevier Ltd
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/25851/ http://umpir.ump.edu.my/id/eprint/25851/ http://umpir.ump.edu.my/id/eprint/25851/ http://umpir.ump.edu.my/id/eprint/25851/7/Microwave-assisted%20extraction%20of%20phenolics%20from%20Hibiscus%20sabdariffa1.pdf
first_indexed	2023-09-18T22:39:55Z
last_indexed	2023-09-18T22:39:55Z
_version_	1777416845943373824

Microwave-assisted extraction of phenolics from hibiscus sabdariffa calyces : kinetic modelling and process intensification

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