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- Title
Evaluation of Oxygen-Limitation on Lipid Oxidation and Moisture Content in Corn Oil at Elevated Temperature.
- Authors
Park, Jung Woo; Kim, Ji Young; Kim, Mi‐Ja; Lee, JaeHwan
- Abstract
The role of oxygen-limitation on lipid oxidation and moisture content were tested in corn oil heated to 60, 100, and 140 °C. The degree of oxidation was determined by analyzing headspace oxygen content, conjugated dienoic acids (CDA), and p-anisidine value ( p-AV). The moisture content in bulk oil was analyzed by the Karl Fischer method. Oxygen-limited samples heated to 100 and 140 °C had significantly more lipid oxidation than oxygen-unlimited samples at early timepoints ( p < 0.05). After this period, the oxygen-unlimited samples had more lipid oxidation based on CDA and p-AV assays. During those initial periods, oxygen-limited samples had significantly higher moisture content than oxygen-unlimited samples ( p < 0.05), which implies that moisture content in oils plays an important role in the rate of lipid oxidation. The increased moisture content in bulk oil under oxygen-limited conditions is due to headspace moisture rather than moisture inside the oil. However, the effects of oxygen-limitation on lipid oxidation were less clear at 60 °C than at 100 or 140 °C.
- Subjects
CORN oil; LIPIDS; OXIDATION; VEGETABLE oils; KARL Fischer technique
- Publication
Journal of the American Oil Chemists' Society (JAOCS), 2014, Vol 91, Issue 3, p439
- ISSN
0003-021X
- Publication type
Article
- DOI
10.1007/s11746-013-2385-y