Ultrasound-Assisted Extraction in Different Solvents for Phytochemical Study of Canna indica

Abstract

Red flowers of Canna indica (Family Cannacece) were extracted in Sonicator with different solvents for the estimation of polyphenols and flavonoids using fresh as well as dry flowers. Antioxidant capacities of L- Ascorbic acid, trolox, pyrogallol and Canna flower extracts were also evaluated based on its ability to scavenge the DPPH radical, results obtained were compared with those of TEAC assay. A good correlation was observed between the two methods. The results showed that acetone extract of fresh flowers contained the highest amount of antioxidant activity 78.33 %, 89.7 mg GAE / g and 51.45 ?MT / g although the yield of the extract in the methanol was highest (34 g / 100 g). Total phenol and flavonoids content (0.96 mg GAE / 100 g) (19.89 mg QE / 100 g) were also evaluated for these extract. This is the first report on the phytochemicals and antioxidant activity from Canna indica flowers particularly for its radical scavenging activity and can be a good source of food additives.