Total Antioxidant Activity and Phenols and Flavonoids Content of Several Plant Extracts

Abstract

Alcoholic extracts of six culinary and medicinal plants have been analyzed for their antioxidative properties. Extracts were obtained by continuous (Soxhlet) and ultrasounds extraction. A new flow injection analysis method with chemiluminescence detection based on a luminol/Co(II)/EDTA/H2O2 system was set up for the total antioxidant capacity determination of the studied extracts. For comparison, total phenols and flavonoids contents of plant extracts were determined by spectrophotometric methods. A good correlation between total phenols and total antioxidant capacity was found for some determinations.