| Autor: |
Aniołowska, Magda A, Kita, Agnieszka M |
| Předmět: |
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| Zdroj: |
Journal of the Science of Food & Agriculture; Apr2016, Vol. 96 Issue 6, p2257-2264, 8p |
| Abstrakt: |
BACKGROUND The objective of this research was to determine the effects of the water content of food incorporated into frying oil on oil degradation and the content of glycidyl esters. Potato chips, French fries and snacks were fried intermittently in palm oil, which was heated at 180 °C for 8 h per day over five consecutive days. Thermo-oxidative and physical alterations, changes in fatty acid composition, total polar components, polar fraction composition, and water content were analysed. The content of glycidyl esters was measured by liquid chromatography-tandem mass spectrometry. RESULTS More polar compounds were formed in the oil used for frying chips (252 g kg−1) than for French fries (229 g kg−1) or snacks (196 g kg−1). Reductions in glycidyl esters were found in oils used for frying - greater for frying snacks and French fries (95% and 93%) than for potato chips (87%). The rate of decrease of glycidyl esters was correlated with frying parameters, most strongly with the concentrations of diacylglycerols ( r = 0.98) and total polar components ( r = −0.98). CONCLUSION The raw material had a greater influence on polymerization conversion and glycidyl ester content than on hydrolytic and oxidative changes in the frying oil. © 2015 Society of Chemical Industry [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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