Effect of Extraction Solvent/Technique on the Antioxidant Activity of Selected Medicinal Plant Extracts

By B. Sultana, F. Anwar, M. Ashraf. Molecules, 2009

1,285 citations recorded by the source corpus.

Theeffects of four extracting solvents [absolute ethanol, absolute methanol, aqueous ethanol (ethanol: water, 80:20 v/v) and aqueous methanol (methanol: water, 80:20 v/v)] and two extraction techniques (shaking and reflux) on the antioxidant activity of extracts of barks of Azadirachta indica, Acacia nilotica, Eugenia jambolana, Terminalia arjuna, leaves and roots of Moringa oleifera, fruit of Ficus religiosa, and leaves of Aloe barbadensis were investigated. The tested plant materials contained appreciable amounts of total phenolic contents (0.31-16.5 g GAE /100g DW), total flavonoid (2.63-8.66 g CE/100g DW); reducing power at 10 mg/mL extract concentration (1.36-2.91), DPPH. scavenging capacity (37.2-86.6%), and percent inhibition of linoleic acid (66.0-90.6%). Generally higher extract yields, phenolic contents and plant material antioxidant activity were obtained using aqueous organic solvents, as compared to the respective absolute organic solvents. Although higher extract yields were obtained by the refluxing extraction technique, in general higher amounts of total phenolic contents and better antioxidant activity were found in the extracts prepared using a shaker.

Subfields: Biochemistry, Pharmacology, Plant Science

View Paper: https://www.semanticscholar.org/paper/4c06f946a73d7e04217f190a437e89c86eaab635

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Citations in the corpus

Cultivation, Genetic, Ethnopharmacology, Phytochemistry and Pharmacology of Moringa oleifera Leaves: An Overview (2015, methodology): “These authors evaluated accessions collected in different locations of Pakistan and accessions from different countries (India, Tanzania, Senegal, Mozambique, Zimbabwe, Florida, Mexico, Haiti, Belize) obtained from Educational Concerns foe Hunger Organization (ECHO).”
Effect of extraction solvent on total phenol content, total flavonoid content, and antioxidant activity of Limnophila aromatica (2013, result): “The results of this study are in agreement with the extraction yields of rice bran [21] and some medicinal plants [22].”