Matthew M. Thelen, Sebastian A. Flores, Jack A. Kelley, Brianna R. Swank, Jill K. Winkler-Moser, Matthew J. Fhaner
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引用次数: 0
Abstract
Square-wave voltammetry (SWV) was investigated as a potential analytical tool for quantitation of unsaturated fatty acid oxidation in edible oils exposed to high heat. A traditional linear regression calibration curve and a novel single-point calibration method were used to quantitate linoleic acid in oxidized oil samples. These methods were compared with a standard method for fatty acid analysis via gas chromatography flame ionization detection (GC-FID). Both GC-FID and SWV methods were able to detect a decrease in linoleic acid concentration for heated oil samples. SWV methods routinely calculated higher linoleic acid concentrations compared with GC-FID analysis. A novel finding is that SWV oxidation peak intensities, which are associated with electroactive compounds, decrease in intensity over time for peaks below 1.0 V and increase for peaks above this voltage. These findings represent a step forward in electrochemical characterization of heated oils in addition to further advancing opportunities for electrochemical oil quality screening.
期刊介绍：
The Journal of the American Oil Chemists’ Society (JAOCS) is an international peer-reviewed journal that publishes significant original scientific research and technological advances on fats, oils, oilseed proteins, and related materials through original research articles, invited reviews, short communications, and letters to the editor. We seek to publish reports that will significantly advance scientific understanding through hypothesis driven research, innovations, and important new information pertaining to analysis, properties, processing, products, and applications of these food and industrial resources. Breakthroughs in food science and technology, biotechnology (including genomics, biomechanisms, biocatalysis and bioprocessing), and industrial products and applications are particularly appropriate.
JAOCS also considers reports on the lipid composition of new, unique, and traditional sources of lipids that definitively address a research hypothesis and advances scientific understanding. However, the genus and species of the source must be verified by appropriate means of classification. In addition, the GPS location of the harvested materials and seed or vegetative samples should be deposited in an accredited germplasm repository. Compositional data suitable for Original Research Articles must embody replicated estimate of tissue constituents, such as oil, protein, carbohydrate, fatty acid, phospholipid, tocopherol, sterol, and carotenoid compositions. Other components unique to the specific plant or animal source may be reported. Furthermore, lipid composition papers should incorporate elements of yeartoyear, environmental, and/ or cultivar variations through use of appropriate statistical analyses.
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