Production of fucoxanthin-rich fraction (FxRF) from a diatom, Chaetoceros calcitrans (Paulsen) Takano 1968

Abstract Fucoxanthin is the major carotenoid produced by diatoms and shown to exhibit potent anti-obesity and anti-cancer activities. This study presents a simple protocol for the preparation of fucoxanthin-rich fraction (FxRF) with high antioxidative properties from a selected marine diatom, Chaetoceros calcitrans . Fucoxanthin concentrates were prepared from crude methanolic extract (CME) with liquid–liquid partitioning of three types of solvent systems (i.e. diethyl ether–water, dichloromethane–water and ethyl acetate–water), followed by comparative antioxidant evaluation. Dichloromethane fraction (DCMF) was found to contain significantly higher (p  − 1  DW) and fucoxanthin (5.25 ± 0.03 mg FX·g − 1  DW) contents accompanied with elevated (p  and ABTS + radical scavenging, and beta carotene bleaching assays) as compared to other tested fractions. This study showed that FxRF with enhanced antioxidant properties could be effectively produced and concentrated through the DCM–H 2 O partition of CME.

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