Journal of Oil Palm Research Vol. 29  September 2017 p.  343-351
DOI: https://doi.org/10.21894/jopr.2017.2903.06

ANTIOXIDANT ACTIVITIES OF Elaeis guineensis LEAVES

Author(s): ANG CHUN HUI*; CHENG SIT FOON* and CHUAH CHENG HOCK*

Fresh leaves from Elaeis guineensis fronds were subjected to ultrasonic-assisted methanol extraction. The crude methanolic extract (MeOH) was then fractionated by repeated extractions, sequentially with solvents of different polarity into n-hexane (HEX), ethyl acetate (EA), water (WATER) and insoluble residue (INSOL) fractions. The antioxidant activity of the crude extract and its fractions was evaluated by in vitro 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging activity, lipid peroxidation (LPO) inhibition and beta-carotene bleaching assays. Total phenolic contents (TPC) in the fractions were determined with Folin-Ciocalteu reagent. The results indicated that the INSOL fraction showed the highest activity in DPPH radical-scavenging activity assay and beta-carotene bleaching assay, while EA fraction exhibited highest activity through LPO inhibition. DPPH radical-scavenging activity of the fractions was negatively correlated (correlation coefficients = -0.896, -0.943 respectively, P < 0.050) with the TPC based on Pearson Product Moment Correlation and Spearman Rank Order Correlation. The findings of present study suggests that oil palm leaves have high potential to be utilised as natural source of antioxidants in palm oil producing countries such as Indonesia, Malaysia and Thailand, where oil palm leaves are abundantly available.

Keywords: , , , ,

Author Information
* Unit of Research on Lipids (URL), Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Lembah Pantai, Kuala Lumpur, Malaysia. E-mail: sfcheng@um.edu.my


Cited By

Call For Papers

Article In Press

Search for:


Most cited articles


SIGN UP To JOPR MAILING LIST

Subscribe with us to get the latest information on Palm Oil Research from MPOB today!