Journal ArticleDOI
Effects of thermally oxidized triglycerides on the oxidative stability of soybean oil
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TLDR
This article showed that thermally oxidized compounds had a significant effect on the volatile compound formatiion and molecular oxygen disappearance in the headspace of oil at α = 0.05.Abstract:
Soybean oil purified by silicic acid column chromatography did not contain peroxides, free fatty acids, phospholipids or oxidized polar compounds. The purified soybean oil was thermally oxidized at 180°C for 96 hr in the presence of air. The thermally oxidized compounds (31.3%) were separated from the purified soybean oil by gradient elution silicic acid chromatography. Thermally oxidized compounds contained hydroxyl groups, carbonyl groups andtrans double bonds according to the infrared spectrum. Thermally oxidized compounds were added to soybean oil and purified soybean oil at 0, 0.5, 1.0, 1.5 and 2.0% to study the effects of these compounds on the oxidative stability of oil. The oxidative stabilities of oils were determined by gas chromatographic analysis of volatile compound formation and molecular oxygen disappearance in the headspace of oil bottles. The thermally oxidized compounds showed prooxidant effects on the oxidative stabilities of both refined, bleached and deodorized soybean oil and purified soybean oil. Duncan’s Multiple Range Test showed that thermally oxidized compounds had a significant effect on the volatile compound formatiion and oxygen disappearance in the headspace of oil at α=0.05.read more
Citations
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Mechanisms and Factors for Edible Oil Oxidation
Eunok Choe,David B. Min +1 more
TL;DR: In this article, the authors studied the role of chlorophyll as a photosensitizer for the formation of 1O2; however, carotenoids and tocopherols decrease the oxidation through 1O 2 quenching.
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Chemistry of deep-fat frying oils
Eunok Choe,David B. Min +1 more
TL;DR: Antioxidant decreases the frying oil oxidation, but the effectiveness of antioxidant decreases with high frying temperature, and lignan compounds in sesame oil are effective antioxidants in deep-fat frying.
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Degradation during application of ultrasound in food processing: A review
TL;DR: In this paper, some of the effects induced by ultrasound on food products in general and more specifically on high lipid containing food material are presented, evidencing the degradation of some compounds and the modifications in physicochemical parameters of food products.
Journal ArticleDOI
Minor Components in Food Oils: A Critical Review of their Roles on Lipid Oxidation Chemistry in Bulk Oils and Emulsions
TL;DR: The origin of these minor components, the influence of oil refining on the type and concentration of minor components present, and potential physicochemical mechanisms by which theseMinor components impact lipid oxidation in bulk oils and emulsions are highlighted.
References
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Spectrometric identification of organic compounds
TL;DR: In this paper, a sequence of procedures for identifying an unknown organic liquid using mass, NMR, IR, and UV spectroscopy is presented, along with specific examples of unknowns and their spectra.
Journal ArticleDOI
Quality assessment of used frying fats: A comparison of four methods
G. Billek,G. Guhr,J. Waibel +2 more
TL;DR: In this paper, the level of petroleum ether insoluble oxidized fatty acids in used frying fats is one of the recommended criteria for assessing their quality in Germany; however, the method of determination is time consuming and inaccurate.
Journal ArticleDOI
Volatile Components from Trilinolein Heated in Air
E. Selke,W. K. Rohwedder +1 more
TL;DR: In this paper, headspace volatiles derived from trilinolenin heated to 192 C in air were collected, separated and identified using a microroom/GC-MS/ computer system.
Journal ArticleDOI
Phospholipids plus tocopherols increase soybean oil stability
TL;DR: In this paper, the effects and interaction of PL and TOC on soybean-oil stability were evaluated using the time in days of oil samples incubated at 110C to reach a peroxide value of 100 meq/kg, and the effect of the PL was not simply a matter of pro-oxidant metal inactivation, but rather appeared to extend the effectiveness of TOC in free-radical termination.
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