Title:In Vitro Antioxidant Activity of Methanolic Leaves and Flowers Extracts of Lippia Alba Authors: Naznin Ara ; Hasan Nur DOI: Aff: Department of Pharmacy, School of Science, Southeast University,
Banani, Dhaka-1213, Bangladesh.Tel: 880-01915500330 Author Email: firstname.lastname@example.org Keywords: Antioxidant; Lippia alba; Free radical; DPPH URLs:ABSTRACT-HTML | FULLTEXT-PDF | Abstract:In-vitro antioxidant activity of methanolic leaves and flowers extract of Lippia alba was
determined by DPPH free radical scavanging assay. The Reducing power of extracts was also determined.
Ascorbic acid was used as standard and positive control for both the analysis.All the analysis was made
with the use of UV-Visible Spectrophotometer (Systronics 117, Japan). The methanolic leaves and flowers
extracts of Lippia alba had shown very significant DPPH (1, 1-diphenyl-2-picryl-hydrazyl) radical
scavenging activity compared to standard antioxidant. The DPPH radical scavenging activity of the extract
was increased with the increasing concentration. In DPPH free radical scavanging assay IC50 value of
leaves and flowers extracts of Lippia alba was foun to be 34.4 ėg/mL. The results concluded that the
extracts have a potential source of antioxidants of natural origin.