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Optothermal window method for on-line monitoring of decay kinetics of trans-β-carotene in thermally treated vegetable oils

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Abstract

The optothermal window detection method at 488 nm was used to monitor on-line the concentration of trans-β-carotene that was added to several vegetable oils after treating them at 200 °C in the presence of air for varying amounts of time. Results obtained for extra virgin oil show a direct proportionality between the rate constant describing the disappearance of trans-β-carotene and the duration of thermal treatment. The rate constant for the decay of trans-β-carotene in oils treated under identical conditions was also dependent on the type of oil. Trends and individual data are discussed in the light of a possible application of the method for the determination of the oxidative stability of vegetable oils.

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Acknowledgements

Credit is to Eric Karruppannan and to Hans de Rooy for technical assistance and to Martijn Buijnsters and Arjan Gijsbertsen for stimulating discussions in the course of this study. Part of the research described in this study was conducted whithin the frame of projects Inco-Copernicus 15ICT961003 and European Thematic Network BRRT-CT96-3041 both supported by the European Commission, Brussels.

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Authors and Affiliations

  1. Laser Laboratory for Photoacoustic and Photothermal Research, Division of Biophysics, Agrotechnology and Food Sciences, Wageningen University and Research Centre, Dreijenlaan 3, 6703 HA, Wageningen, The Netherlands

    Otto Ganguli & Dane Bicanic

  2. Department of Food Chemistry and Nutrition, Faculty of Food Science and Biotechnology, University of Zagreb, Pierottijeva 6, Zagreb, Croatia

    Dane Bicanic

  3. Department of Physical Chemistry, Ruđer Bošković Institute, Bijenička c. 54, 10000, Zagreb, Croatia

    Marija Bonifačić

  4. Dipartimento di Scienze degli Alimenti, Università degli Studi di Udine, via Marangoni 97, 1 33100, Udine, Italy

    Maria Cristina Nicoli

  5. , Institute for Isotopic and Molecular Technology, P.O.Box 700, 3400 , Cluj-Napoca 5, Romania

    Mihai Chirtoc

Authors
  1. Otto Ganguli
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  2. Dane Bicanic
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  3. Marija Bonifačić
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  4. Maria Cristina Nicoli
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  5. Mihai Chirtoc
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Correspondence to Dane Bicanic.

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Ganguli, O., Bicanic, D., Bonifačić, M. et al. Optothermal window method for on-line monitoring of decay kinetics of trans-β-carotene in thermally treated vegetable oils. Eur Food Res Technol 217, 74–79 (2003). https://doi.org/10.1007/s00217-003-0702-7

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  • DOI: https://doi.org/10.1007/s00217-003-0702-7

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