Abstract
► Peanut oil was thermally stressed in the presence of materials used for food processing. ► Copper was found to deeply accelerate the buildup of secondary oxidation products. ► EPR spectroscopy was employed to investigate the nature of dissolved Cu(II) ions. ► DFT calculations were used to support possible structures of Cu(II) oxo complexes. The effect of materials commonly employed in domestic food processing was investigated in vegetable oil undergoing episodes of thermal stress (180 °C). 1 H NMR spectroscopy was employed to follow the evolution of lipid peroxidation products, notably hydroperoxides and aldehydes. In samples containing copper foils, EPR spectroscopy was employed to investigate the nature of dissolved Cu(II) ions, which are known to be responsible for the decomposition of hydroperoxides. DFT calculations were used to support possible structures of Cu(II) oxo complexes.
Published Version
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