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Rapid determination of alpha tocopherol in olive oil adulterated with sunflower oil by reversed phase high-performance liquid chromatography

Journal of Food Science and Technology volume 52, pages 3093–3098 (2015)Cite this article

Abstract

A new method is developed to determine the presence of sunflower oil in olive oil. α-tocopherol is selected as discriminating parameter for detecting sunflower oil adulterant in olive oil. Admixtures of olive oil and sunflower oil (5 %, 10 %, 15 % and 20 % sunflower oil in olive oil) are prepared. These admixtures are analysed by reversed phase high pressure liquid chromatography coupled with fluorescence detector. The sample preparation does not require saponification or addition of antioxidant. The chromatographic system consists of a C18 column with methanol: acetonitrile (50:50) mobile phase. Fluorescence detector excitation wavelength is set at 290 nm and emission wavelength is set at 330 nm. The α tocopherol concentration increases linearly in olive oil adulterated with sunflower oil. The method is simple, selective, sensitive and is precise (RSD = 2.65 %) for α tocopherol. The present method can precisely detect 5 % sunflower oil in olive oil.

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Acknowledgments

Authors thanks to UGC, New Delhi, BCUD, University of Pune for financial support and KTHM College Nashik, Dr. M. K. Malve, Director Forensic laboratory, Govt. of Maharashtra for the facilities and support during the work.

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Affiliations

  1. Forensic Science Laboratory, Mumbai, India

    S. M. Bakre & D. K. Gadmale

  2. Department of Chemistry, KTHM College, Nashik, India

    R. B. Toche

  3. University of Pune, Pune, India, 422002

    V. B. Gaikwad

Authors
  1. S. M. Bakre
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  2. D. K. Gadmale
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  3. R. B. Toche
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  4. V. B. Gaikwad
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Correspondence to S. M. Bakre.

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Bakre, S.M., Gadmale, D.K., Toche, R.B. et al. Rapid determination of alpha tocopherol in olive oil adulterated with sunflower oil by reversed phase high-performance liquid chromatography. J Food Sci Technol 52, 3093–3098 (2015). https://doi.org/10.1007/s13197-014-1309-7

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  • DOI: https://doi.org/10.1007/s13197-014-1309-7

Keywords

  • Olive oil
  • Adulteration
  • Vegetable oil
  • Sunflower oil α Tocopherol and High pressure liquid chromatography