Antioxidant activity of the phenolic leaf extracts from monechma ciliatum in stabilization of corn oil

Abdalbasit Adam Mariod, Ramlah Mohamad Ibrahim, Maznah Ismail, Norsharina Ismail

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

The total phenolic content and the antioxidant potential of methanolic extract (ME), ethyl acetate extract (EAE), and hexane extract (HE) from Monechma ciliatum leaves (MCL) were evaluated. The Folin-Ciocalteu, β-carotene bleaching, the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and the accelerated oxidation methods were used for evaluation. Both the extraction yield and the antioxidant activity (AOA) were strongly dependent on the solvent. Among the extracts, ME exhibited highest total phenolic compounds (TPC) and IC50 values for DPPH, followed by EAE and HE, respectively. Peroxide value (PV), anisidine value (AV) conjugated dienes (CD), and thiobarbituric acid reactive substances (TBARS) were taken as the parameters for evaluation of stabilization efficacy of MCL extracts and results revealed MCL to be a potent antioxidant for the stabilization of corn oil. As a general trend, increased AOA was observed for increased extract concentration. The predominant phenolic compounds identified by HPLC-DAD in MCL extracts were p-coumaric acid, vanillin and ferulic acid.

Original languageEnglish
Pages (from-to)35-43
Number of pages9
JournalJournal of the American Oil Chemists' Society
Volume87
Issue number1
DOIs
Publication statusPublished - Jan 2010
Externally publishedYes

Keywords

  • β-Carotene bleaching assay
  • 2,2-Diphenyl-1- picrylhydrazyl (DPPH)
  • Antioxidant activity
  • Monechma ciliatum
  • Oil oxidation
  • Total phenolic content

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