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Titre du Document
Pattern of Peroxide Value Changes in Virgin Coconut Oil (VCO) Due to Photo-Oxidation Sensitized by Chlorophyll
Auteur(s)
Rukmini Ambar ; Raharjo Sri
Résumé
The effect of chlorophyll in photo-oxidation of virgin coconut oil (VCO) during production and storage was studied. Photo-oxidation during VCO production was performed under accelerated conditions using fluorescent lights (4,000 lux) for 8 h. Peroxide values (PVs) and chlorophyll contents of the samples were measured at 1 h intervals. To compare the photo-oxidation during storage, VCO samples were separately stored under ambient and normal room light intensity (380–400 lux) for up to 4 months and PVs were measured weekly. The results indicated that relatively low light intensity during the settling stage of VCO production had no significant effect on photo-oxidation. Photo-oxidation of VCO, however, was observed during storage when exposed to high intensity fluorescent light. The degradation of chlorophyll content in VCO was evident during exposure to a high fluorescent light intensity which was accompanied by high lipid peroxide accumulation. A significant negative correlation between PV and chlorophyll content was found in VCO without light protection. The storage of VCO significantly increased the PV after 10 weeks. This study confirmed that chlorophyll which is naturally present in VCO even at a very low level (less than 0.1 ppm) could initiate a photo-oxidation reaction leading to quality deterioration during prolonged storage or display at retailers.
Editeur
Springer
Identifiant
ISSN : 1558-9331
Source
Journal of the American Oil Chemists' Society (Online) A. 2010, vol. 87, n° 12, pp. 1407-1412 [6 pages]
Langue
Anglais
Copyright
AOCS, 2010
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