Oxidative stability and AromaScan analyses of corn oils with altered fatty acid content

Thumbnail Image
Date
1999-12-01
Authors
Shen, N.
Duvick, Susan
White, Pamela
Pollak, Linda
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
White, Pamela
University Professor Emeritus
Research Projects
Organizational Units
Organizational Unit
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
Food Science and Human NutritionAgronomy
Abstract

This project was designed to evaluate the oxidative stability of corn oils with increased total saturated fatty acid composition and to test the feasibility of using the AromaScan, an “electronic nose,” to detect the odors/aromas produced by oxidation. Corn oils with traditional (13.1%) and elevated (14.7 to 17.1%) total saturated fatty acid percentages were evaluated for their oxidative quality. Oils from five corn genotypes were extracted, refined, bleached, and deodorized (RBD) in the laboratory. Two replications, separated at the point of extraction, were evaluated for each genotype. The RBD corn oils (18.0 g) were stored in 50-mL beakers at 60°C in the dark, and peroxide values were measured every other day for 8 d. Corn oils with elevated saturated fatty acid compositions were more stable (P<0.05) than the traditional corn oil. Aroma intensity of the oils was measured with an AromaScan at days 0, 4, and 8. The AromaScan provided a useful tool to detect odors/aromas produced by oxidation during an oxidative stability study; this tool might be used to partly replace human sensory panel evaluation of oxidized samples.

Comments

This article is from Journal of the American Oil Chemists' Society, December 1999, 76(12); 1425-1429. DOI: 10.1007/s11746-999-0179-z.

Description
Keywords
Citation
DOI
Copyright
Collections