Optimization of astaxanthin extraction from red (Gracilaria corticata) and brown (Sargassum polycystum) macroalgae through ultrasonication and microwave processing.

ABSTRACT: This study aimed at optimizing the extraction of astaxanthin (ASX) by microwave- and ultrasound-assisted methods through an organic solvent (a mixture of ethanol and ethyl acetate), a green solvent (a microemulsion (MEL) of tributyloctylphosphonium bromide ionic liquid in water), and a vegetable oil (sunflower oil) from red (Gracilaria corticate/GC) and brown (Sargassum polycystum/SP) macroalgae. First, MELs were evaluated in terms of density, particle size and conductivity. Then, total carotenoids, ASX content, ASX extraction efficiency and DPPH scavenging activity were measured to evaluate the performance of different extraction methods. According to the results, the density of MEL was 0.97 g/cm³, its diameter was 15.80 nm and the conductivity was 312 µS/cm at 27.1 °C. Based o

SUBMITTER: Feizi P 

PROVIDER: S-EPMC12504982 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature