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Effect of Some Transition Metals on the Monolayer Oxidation of Methyl Linoleate

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Journal of the American Oil Chemists' Society

Abstract

Methyl linoleate was deposited as a monolayer on a silica gel control and on silica gel supplemented with double or quadruple the control’s amount of the transition metal ions (TMI) iron, copper, vanadium or titanium. The treatments were oxidized at 25 °C, and periodically samples were examined for peroxide values (PV) and by gas chromatography for oxidation products (GC). Comparison of the treatments revealed that: Surface oxidation on silica gel owes its high rate to TMI, which may speed free radical initiation. Epoxidation is catalyzed by the presence of vanadium and titanium. Scission products (SP) and unrecovered mass increased with the extent of oxidation probably because of increased free radical life time.

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Acknowledgments

We are grateful to the Scientific Research Projects (BAP), Ankara University, Project number 2005 0745036, for financial support.

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Authors and Affiliations

  1. Department of Food Engineering, Faculty of Engineering, University of Ankara, 06110, Diskapi Ankara, Turkey

    Yasemin Koprucuoglu, Eda Calikoglu & Aziz Tekin

  2. Department of Food Science and Human Nutrition, 2312 Food Sciences Building, Iowa State University, Ames, IA, 50011, USA

    Earl G. Hammond

Authors
  1. Yasemin Koprucuoglu
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  2. Eda Calikoglu
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  3. Aziz Tekin
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  4. Earl G. Hammond
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Corresponding author

Correspondence to Earl G. Hammond.

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Koprucuoglu, Y., Calikoglu, E., Tekin, A. et al. Effect of Some Transition Metals on the Monolayer Oxidation of Methyl Linoleate. J Am Oil Chem Soc 88, 1845–1848 (2011). https://doi.org/10.1007/s11746-011-1833-9

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  • DOI: https://doi.org/10.1007/s11746-011-1833-9

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