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Relationship between the kinetics of β-carotene degradation and formation of norisoprenoids in the storage of dried sweet potato chips

Relationship between the kinetics of β-carotene degradation and formation of norisoprenoids in the storage of dried sweet potato chips

Bechoff, Aurélie, Dhuique-Mayer, Claudie, Dornier, Manuel, Tomlins, Keith I., Boulanger, Renaud, Dufour, Dominique and Westby, Andrew (2010) Relationship between the kinetics of β-carotene degradation and formation of norisoprenoids in the storage of dried sweet potato chips. Food Chemistry, 121 (2). pp. 348-357. ISSN 0308-8146 (doi:10.1016/j.foodchem.2009.12.035)

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Abstract

The effects of storage temperature (10; 20; 30; 40 °C), water activity (0.13; 0.30; 0.51; 0.76) and oxygen level (0%; 2.5%; 10%; 21%) on the degradation of carotenoids and formation of volatile compounds during storage of dried sweet potato chips were evaluated. A kinetic model was developed for degradation of trans-β-carotene and it showed that breakdown followed first order kinetics with an activation energy of 64.2 kJ mol−1. The difference between experimental data under laboratory or field conditions fitted and data predicted by the model was less than 10% for trans-β-carotene, or for total carotenoids. The formation of the volatile compounds, β-ionone; 5,6-epoxy-β-ionone; dihydroactinidiolide; β-cyclocitral, was measured by SPME-GC-MS and was clearly related to the degradation of trans-β-carotene. It is also suggested that carotenoid degradation in dried sweet potato was by autoxidation because of the trend in β-carotene degradation rate in relation to water activity or oxygen level.

Item Type: Article
Additional Information: [1] Published in print: 15 July 2010. [2] Published as: Food Chemistry, (2010), Vol. 121, (2), pp. 348-357.
Uncontrolled Keywords: carotenoids, dried sweet potato, Ipomoea batatas L, kinetics, Norisoprenoids, oxygen, storage, temperature, volatile compounds, water activity
Subjects: S Agriculture > S Agriculture (General)
Q Science > Q Science (General)
Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Related URLs:
Last Modified: 11 Sep 2014 11:04
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/3872

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