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By Afaf Kamal-Eldin, Jan Pokorny

Lipid oxidation, even though researched because the starting of the twentieth century, nonetheless offers no entire and passable details at the composition of oxidized lipids. One vital issue contributing to those gaps in our wisdom approximately lipid oxidation pertains to the shortages in analytical technique. Analytical equipment compatible for oxidized lipids have been frequently reviewed within the final decade, yet in general from the point of decision of person oxidized lipid sessions, equivalent to peroxides, aldehydes, polar lipids, or polymers. during this booklet, they're taken care of from the viewpoint of sorts of analytical tools used, together with various volumetric tools, UV-visible spectrometric equipment, excessive functionality size-exclusion chromatography, nuclear magnetic resonance spectroscopy, electron spin resonance spectroscopy, and differential scanning calorimetry. research of Lipid Oxidation is key for extra advancements in analytical method and hyphenated recommendations, with which extra knowing of the response kinetics, mechanism, and implications will ensue.

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Oil Chem. Soc. 68, 51–55. Kreis, H. (1899) Über neue Farbenreaktionen fetter Öle, Chemiker-Ztg. 23, 802–803. , and Oyama, T. (1965) Estimation of Total Carbonyl Content in Oxidized Oil by 2,4-Dinitrophenylhydrazine, Yukagaku 14, 167–171. A. (2001) Direct Olive Oil Anisidine Value Determination by Flow Injection, Anal. Chim. Acta 448, 201–206. , and Täufel, K. (1964) Analysis of Carbonyl Compounds in the Presence of Hydroperoxides After Reduction with Potassium Iodide, Fette Seifen Anstrichm. 66, 866–869 and 1052–1058.

2004) Modified Ferrous Oxidation-Xylenol Orange Method to Determine Lipid Hydroperoxides in Fried Snacks, Eur. J. Lipid Sci. Technol. 106, 688–696. , and Jacobsen, C. (2003) Comparison of Wet Chemical Methods for Determination of Lipid Hydroperoxides, J. Food Lipids 10, 35–50. , and Hautfenne, A. , Blackwell, Oxford. , and Hautfenne, A. , Blackwell, Oxford. Copyright © 2005 AOCS Press Ch3(OxiAnalysis)(17-39)Co1 3/24/05 4:15 AM Page 38 Pardun, H. (1974) Beurteilung des Präoxydationsgrades bzw. der Oxydationsstabilität pflanzlicher Öle aufgrund ihrer Benzidinoder Anisidinzahl, Fette Seifen Anstrichm.

10), whereas the absorption maximum of alkanals was developed at 450 nm. Malonaldehyde is produced by decomposition of hydroperoxides produced from unsaturated aldehydes. A mechanism for the reaction with aldehydes in which retroaldolization of unsaturated aldehydes may occur during the treatment was suggested (Kosugi and Kikugawa 1986). Lipid hydroperoxides also react with TBA, with the production of the same red pigment as that produced by the reaction of TBA with malonaldehyde. It was observed that lipid hydroperoxides dramatically increased the TBA value of a mixture of malonaldehyde, alkenal, and alkadienal (Kosugi and Kikugawa 1989).

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