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  • Title: Analysis of oxidation products and toxic compounds in edible and blended oil during the deep-frying of french fries.
    Author: Chu M, Noh E, Lee KG.
    Journal: Food Sci Biotechnol; 2024 Jul; 33(10):2275-2287. PubMed ID: 39145121.
    Abstract:
    UNLABELLED: This study sought to analyze the oxidative products [acid value (AV), free fatty acids (FFA), conjugated dienoic acid (CDA), p-anisidine value (p-AV), antioxidant-prooxidant balance (APB) value] and toxic compounds [3-monochloropropane diol (3-MCPD), glycidyl ester (GE)] in edible oils after deep-frying. The deep-frying edible oils evaluated herein included soybean oil (S), palm oil (P), canola oil (C), grape seed oil (G), and a 1:1 blend (SC, SG, PC, PG, and CG). As frying time increased, the level of AV in PC, total FFA contents in CG, and p-AV in CG significantly increased up to 200%, 45.5%, and 410.5%, respectively (p < 0.05). The levels of 3-MCPD, and GE were 0.81-6.28 µg/mL and 0.14-2.84 µg/mL, respectively. The levels of 3-MCPD, GE, CDA, and APB changed significantly as frying time increased. Analysis of the correlation between oxidation products and toxic compounds indicated that the contents of 3-MCPD and palmitic acid were positively correlated. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10068-023-01494-9.
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