Identification of products from canthaxanthin oxidation

Mordi, Raphael C. and Walton, John C. (2016) Identification of products from canthaxanthin oxidation. Food Chemistry . pp. 836-840.

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Abstract

Canthaxanthin is a carotenoid that lacks pro-vitamin A activity but is known to have antioxidant activity. The products of its oxidation in oxygen were found to be mainly substituted apo-carotenals and apocarotenones. The product profile resembles that obtained in the oxidation of b-carotene, except that with canthaxanthin these products are the 4-oxo-b-apo-carotenals and 4-oxo-b-apo-carotenones. Epoxides and diepoxides were clearly identified from b-carotene oxidation but in contrast, with canthaxanthin, apart from 5,6-epoxy-canthaxanthin, which was detected at the early stage of oxidation and minor quantities of 5,6-epoxy-b-ionone and 5,6-epoxy-4-oxo-b-apo-11-carotenal, no other epoxides were detected. The identities of these products lead us to suggest that the mechanism of canthaxanthin oxidation bears significant similarity to that of b-carotene.

Item Type:	Article
Uncontrolled Keywords:	Canthaxanthin b-Carotene Carotenoids Oxidation Antioxidant Apo-carotenoids
Subjects:	Q Science > QD Chemistry
Divisions:	Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	20 Nov 2015 13:01
Last Modified:	20 Nov 2015 13:01
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/5654

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