Correlation between chemical composition and radical scavenging activity of 10 commercial essential oils: Impact of microencapsulation on functional properties of essential oils

Arabian Journal of Chemistry

Tarek Nour Soliman¹  Ahmed H. El-Ghorab²  Khaled F. El-Massry²  Shereen Nazeh Lotfy³  Hoda Hanem Mohamed Fadel³  Mohamad Yehia Sayed Ahmed³  Ahmed M.S. Hussein⁴ 

[1] Corresponding author.;Chemistry Department, Collage of Science, Jouf University, Sakaka, Saudi Arabia;Chemistry of Flavour and Aroma Department, National Research Centre, Cairo, Egypt;Department of Food Science and Technology, National Research Centre, Cairo, Egypt;

关键词: Scavenging radical activity;    Essential oil;    Encapsulation;    Phenolic content;    Emulsion extrusion;   

DOI  :  

来源: DOAJ

【 摘 要 】

A comparative study was carried out on the essential oils of 10 aromatic plants that are extensively used in Egypt for their distinctive aroma and functional properties. Each essential oil (EO) was characterized by means of gas chromatography-mass spectrometry (GC–MS) analysis and evaluated for its radical scavenging activity by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azinobis (2-ethyl-benzolhiaxoline-6-sulfonic acid)(ABTS) assays. The phenolic content of the 10 EOs was in the descending order: clove > thyme > majoram > basil > anise > chamomile > cinnamon > dill > ginger > rosemary. The radical scavenging activity of the EOs was correlated to the presence of phenolic compounds, such as eugenol, thymol, carvacrol and trans-anethol, or the synergism between the antioxidant activity of nonphenolic compounds such as terpinene-4-ol, α-terpinene, curcumene and chamazulene. Clove essential oil exhibited the highest oil content and radical scavenging activity so it was encapsulated, separately, in three coating materials. Sodium alginate showed the highest retention, encapsulation efficiency and loading capacity of clove EO. Microencapsulation in sodium alginate and chitosan improved the antioxidant activity and phenolic content of the encapsulated clove EO compared with carboxymethyl cellulose. The results support the possibility of using the encapsulated EOs as natural and easy handle antioxidants.

【 授权许可】

Unknown