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A comparative assessment of microwave assisted (MAE) and conventional solid-liquid (SLE) techniques for the extraction of phloroglucinol from brown seaweed

journal contribution
posted on 2023-05-19, 12:20 authored by Magnusson, M, Yuen, AKL, Zhang, R, Jeffrey WrightJeffrey Wright, Taylor, RB, Maschmeyer, T, de Nys, R
Brown seaweeds are rich in polyphenols with a basic building block of 1,3,5-trihydroxybenzene (phloroglucinol) and were investigated as a bioresource for the extraction of polyphenols for biopolymers and bioproducts. Species of seaweed with high contents of polyphenols were identified through meta-analysis and selected for the comparative assessment of the extraction efficiency of polyphenols using microwave assisted (MAE) vs. conventional solid-liquid (SLE) extraction. Out of ten species from Australia and New Zealand screened by SLE, Carpophyllum flexuosum (8.6%) and C. plumosum (7.5%) had the highest contents of polyphenols and were selected for MAE along with commercially available Ecklonia radiata. C. flexuosum was identified as the key species for extraction of polyphenols, with a 70% increase in yield using optimized MAE (aqueous, biomass:solvent ratio 1:30, 160°C, 3 min) compared to SLE. The cell-wall bound fraction of polyphenols in brown seaweed may be larger than previously thought and is accessible through MAE.


Publication title

Algal Research








Institute for Marine and Antarctic Studies


Elsevier BV

Place of publication


Rights statement

Copyright 2017 Elsevier B.V.

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Socio-economic Objectives

Other plant production and plant primary products not elsewhere classified