African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12294

Full Length Research Paper

Stabilisation potentials of the essential oils of Thymus vulgaris L., Cinnamomum zeylanicum B. and Mentha piperita L. on palm olein at accelerated storage

Wilson Agwanande Ambindei
  • Wilson Agwanande Ambindei
  • ENSAI, University of Ngaoundere, P. O. Box 455, Ngaoundere, Cameroon.
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Pierre Michel Dongmo Jazet
  • Pierre Michel Dongmo Jazet
  • Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon.
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Leopold Ngoune Tatsadjieu
  • Leopold Ngoune Tatsadjieu
  • IUT, University of Ngaoundere, P.O. Box 455, Ngaoundere, Cameroon.
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Priya P.
  • Priya P.
  • Environmental Technology Division, CSIR-NIIST, 695019 Thiruvananthapuram, India.
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Nisha P.
  • Nisha P.
  • Agro Processing Division, CSIR-NIIST, 695019 Thiruvananthapuram, India.
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  •  Received: 21 January 2020
  •  Accepted: 25 February 2020
  •  Published: 31 July 2020

Abstract

This study aims at bringing to light the preservative potential of essential oils of Thymus vulgaris, Cinnamomum zeylanicum and Mentha piperita in the stabilisation of lipids against oxidation. The essential oils were extracted by hydrodistillation and chemical composition were analysed by gas chromatography coupled with mass spectrometry. In vitro antioxidant potentials of the essential oils were tested by the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and hydrogen peroxide (H2O2) methods. The effects of essential oils on palm olein during accelerated storage for 20 days were carried out using the Shaal Oven test and indices of oxidation were measured. Essential oil of T. vulgaris was the most active oil with respect to the DPPH and H2O2 tests. T. vulgaris and C. zeylanicum showed varying degree of inhibition to palm olein oxidation within 20 days of storage at 60°C. Essential oils of T. vulgaris and C. zeylanicum at a concentration of 300 ppm showed comparable results to that of tert-butyl hydroquinone (TBHQ) applied at the recommended dose of 200 ppm. Palm olein samples treated with the essential oils did not show rancid characteristics at the end of storage. These essential oils significantly stabilised palm olein during accelerated storage conditions and may be exploited for use as preservatives in food products.

 

Key words: Antioxidant, essential oils, Thymus vulgaris, Cinnamomum zeylanicum and Mentha piperita, palm olein, food preservatives.