Rapid screening and guided extraction of antioxidants from microalgae using voltammetric methods.
Currently, microalgae draw much attention as a promising source of natural antioxidants to replace synthetic antioxidants for food applications. In this paper, the use of voltammetric techniques as a fast alternative for chemical assays to determine the antioxidant power of microalgal biomass is discussed. It was found that antioxidant activities determined by square wave voltammetry correlate well with the results from other established antioxidant assays, such as Trolox equivalent antioxidant capacity (R(2) = 0.737), ferric reducing antioxidant potential (R(2) = 0.729), and AAPH-induced oxidation of linoleic acid (R(2) = 0.566). Besides yielding quantitative data on the antioxidant activity, square wave voltammetry provides additional information on the antioxidant profile of microalgal biomass as the peak potentials of antioxidant components are determined. Consequently, square wave voltammetry can be used as a tool for optimizing the extraction processes to recover antioxidant components from microalgae.
KAHO Sint-Lieven , Laboratory of Enzyme, Fermentation, and Brewing Technology, Gebroeders De Smetstraat 1, 9000 Ghent, Belgium.
Koen
K
Goiris
Peter
P
De Vreese
Luc
L
De Cooman
Koenraad
K
Muylaert
D000975:Antioxidants / Q000032:analysis*; D018533:Biomass; D002338:Carotenoids / Q000032:analysis; D016014:Linear Models; D058086:Microalgae / Q000737:chemistry*; D010636:Phenols / Q000032:analysis
D000975:Antioxidants; D010636:Phenols; D002338:Carotenoids