Optimisation of Ultrasound Frequency, Extraction Time and Solvent for the Recovery of Polyphenols, Phlorotannins and Associated Antioxidant Activity from Brown Seaweeds

Files in This Item:
File Description SizeFormat 
marinedrugs-18-00250.pdf739.45 kBAdobe PDFDownload
Title: Optimisation of Ultrasound Frequency, Extraction Time and Solvent for the Recovery of Polyphenols, Phlorotannins and Associated Antioxidant Activity from Brown Seaweeds
Authors: Ummat, VirujaTiwari, Brijesh K.Jaiswal, Amit K.Condon, KevinGarcía-Vaquero, MarcoO'Doherty, John V.O'Donnell, C. P. (Colm P.)Rajauria, Gaurav
Permanent link: http://hdl.handle.net/10197/11956
Date: 11-May-2020
Online since: 2021-02-17T10:40:24Z
Abstract: This study investigates ultrasound assisted extraction (UAE) process parameters (time, frequency and solvent) to obtain high yields of phlorotannins, flavonoids, total phenolics and associated antioxidant activities from 11 brown seaweed species. Optimised UAE conditions (35 kHz, 30 min and 50% ethanol) significantly improved the extraction yield from 1.5-fold to 2.2-fold in all seaweeds investigated compared to solvent extraction. Using ultrasound, the highest recovery of total phenolics (TPC: 572.3 ± 3.2 mg gallic acid equivalent/g), total phlorotannins (TPhC: 476.3 ± 2.2 mg phloroglucinol equivalent/g) and total flavonoids (TFC: 281.0 ± 1.7 mg quercetin equivalent/g) was obtained from Fucus vesiculosus seaweed. While the lowest recovery of TPC (72.6 ± 2.9 mg GAE/g), TPhC (50.3 ± 2.0 mg PGE/g) and TFC (15.2 ± 3.3 mg QE/g) was obtained from Laminaria digitata seaweed. However, extracts from Fucus serratus obtained by UAE exhibited the strongest 1,1-diphenyl-2-picryl-hydrazyl (DPPH) scavenging activity (29.1 ± 0.25 mg trolox equivalent/g) and ferric reducing antioxidant power (FRAP) value (63.9 ± 0.74 mg trolox equivalent/g). UAE under optimised conditions was an effective, low-cost and eco-friendly technique to recover biologically active polyphenols from 11 brown seaweed species.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: MDPI
Journal: Marine Drugs
Volume: 18
Issue: 5
Copyright (published version): 2020 the Authors
Keywords: Ultrasound assisted extractionConventional extractionPolyphenolsPhlorotanninMacroalgaeAntioxidant capacity
DOI: 10.3390/md18050250
Language: en
Status of Item: Peer reviewed
ISSN: 1660-3397
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by/3.0/ie/
Appears in Collections:Biosystems and Food Engineering Research Collection
Agriculture and Food Science Research Collection

Show full item record

Page view(s)

103
checked on Feb 25, 2021

Download(s)

2
checked on Feb 25, 2021

Google ScholarTM

Check

Altmetric


If you are a publisher or author and have copyright concerns for any item, please email research.repository@ucd.ie and the item will be withdrawn immediately. The author or person responsible for depositing the article will be contacted within one business day.