Effect of Extraction Solvent/Technique on the Antioxidant Activity of Selected Medicinal Plant Extracts
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Open Access
- 15 June 2009
- Vol. 14 (6), 2167-2180
- https://doi.org/10.3390/molecules14062167
Abstract
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.Keywords
This publication has 28 references indexed in Scilit:
- Antioxidant properties of various solvent extracts of mulberry (Morus indica L.) leavesFood Chemistry, 2007
- Citrus peel extract – A natural source of antioxidantFood Chemistry, 2006
- Evaluation of the antioxidant activity of rice bran extracts using different antioxidant assaysGrasas y Aceites, 2006
- An industrial approach in the search of natural antioxidants from vegetable and fruit wastesFood Chemistry, 2006
- Antioxidant activity of various plant extracts under ambient and accelerated storage of sunflower oilGrasas y Aceites, 2006
- Evaluation of antioxidant properties of pomegranate peel extract in comparison with pomegranate pulp extractFood Chemistry, 2006
- Antioxidant activity of the extracts from Dillenia indica fruitsFood Chemistry, 2005
- Antioxidant Phenols in Barley (Hordeum vulgare L.) Flour: Comparative Spectrophotometric Study among Extraction Methods of Free and Bound Phenolic CompoundsJournal of Agricultural and Food Chemistry, 2004
- Antioxidant Properties of Various Solvent Extracts of Total Phenolic Constituents from Three Different Agroclimatic Origins of Drumstick Tree (Moringa oleifera Lam.) LeavesJournal of Agricultural and Food Chemistry, 2003
- Sample preparation in the determination of phenolic compounds in fruitsThe Analyst, 2000