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Quantitative determination of conjugated linoleic acids in hydrogenated vegetable oils using refractive index

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Abstract

Conjugated linoleic acid contents in hydrogenated vegetable oils were differentially determined using refractive indices when the iodine value could not be used. The refractive indices of soybean oil, cottonseed oil, and corn oil varied linearly with changes of linoleic acid contents of individual oils with determination coefficients of 0.91, 0.98, and 0.98, respectively. The refractive index can be used as a simple and fast method for control of the hydrogenation process of vegetable oils to obtain a desired conjugated linoleic acid content without fatty acid compositional analysis.

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Authors and Affiliations

  1. Department of Food Science and Culinary Art, Woosuk Unversity, Samnye, Jeonbuk, 55338, Korea

    Mun Yhung Jung

  2. Food Analysis Center, Korea Food Research Institute, Seongnam, Gyeonggi, 13539, Korea

    Ji Su Park

  3. Department of Food Science and Biotechnology, Woosuk University, Samnye, Jeonbuk, 55338, Korea

    Suk Hoo Yoon

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  1. Mun Yhung Jung
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  2. Ji Su Park
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  3. Suk Hoo Yoon
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Correspondence to Suk Hoo Yoon.

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Jung, M.Y., Park, J.S. & Yoon, S.H. Quantitative determination of conjugated linoleic acids in hydrogenated vegetable oils using refractive index. Food Sci Biotechnol 25, 121–124 (2016). https://doi.org/10.1007/s10068-016-0018-6

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  • DOI: https://doi.org/10.1007/s10068-016-0018-6

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