Ascorbyl palmitate, gamma-tocopherol, and EDTA affect lipid oxidation in fish oil enriched salad dressing differently

Publication: Research - peer-reviewJournal article – Annual report year: 2007

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The aim of the study was to investigate the ability of γ-tocopherol, ethylenediaminetetraacetate (EDTA), and ascorbyl palmitate to protect fish oil enriched salad dressing against oxidation during a 6 week storage period at room temperature. The lipid-soluble γ-tocopherol (220 and 880 µg g-1 of fish oil) reduced lipid oxidation during storage by partly retarding the formation of lipid hydroperoxides (PV) and by decreasing the concentrations of individual volatile oxidation products by 34-39 and 42- 66%, respectively. EDTA (10 and 50 µg g-1 of dressing) was the most efficient single antioxidant, and overall peroxide values and volatiles were reduced by approximately 70 and 77-86%, respectively. Conversely, prooxidant effects were observed with a high concentration of ascorbyl palmitate (300 µg g-1 of fish oil), whereas a low concentration was slightly antioxidative (50 µg/g of fish oil). Finally, a combination of all three antioxidants completely inhibited oxidation during storage, indicating that the prooxidant effects of ascorbyl palmitate were reverted or overshadowed by EDTA and γ-tocopherol.
Original languageEnglish
JournalJournal of Agricultural and Food Chemistry
Volume55
Issue number6
Pages (from-to)2369-2375
ISSN0021-8561
DOIs
StatePublished - 2007
CitationsWeb of Science® Times Cited: 46

    Keywords

  • Fish oil , Lipid oxidation, Antioxidants, omega-3 PUFA , Ascorbyl palmitate, Tocopherol, EDTA , salad dressing
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