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Effects of Temperature Change on the Physico-Chemical Properties of Sesame Seed Oil

Received: 22 January 2019     Accepted: 26 February 2019     Published: 1 April 2019
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Abstract

Heating is one of the most commonly used methods of food preparation in homes and industries and prolong use of oil for this purpose causes changes in its physical and chemical properties. The effects of changing temperature on various chemical and physical characteristics of sesame seed oil were studied. The oil was extracted using soxhlet apparatus with n-hexane as extraction solvent. The seeds of sesame (Sesamumindicum) were found to have high oil content. Both the chemical and physical characteristics were investigated within a temperature range of 25-290°C. At room temperature (25°C), the results revealed the chemical characteristics as follows: acid value (AV) (5.61mg/g); peroxide value (PV) (4.42 Meq/kg); free fatty acid (FFA) (5.89%). The physical characteristics were: moisture content (MC) (5.50%); density (0.99g/cm3); refractive index (RI) (1.47). At elevated range of temperatures (170-290°C), there were corresponding changes in both chemical and physical parameters as follows: AV (5.61-5.91mg/g); PV (4.44-6.05 Meq/kg); FFA (5.91-6.06%); MC (3.98-0.71%); density (0.95-0.69g/cm3); RI (1.46-1.40). The study showed that there was gradual increase in chemical properties with increase in temperature whereas, the physical properties decreased gradually with increase in temperature.

Published in Science Journal of Analytical Chemistry (Volume 7, Issue 1)
DOI 10.11648/j.sjac.20190701.12
Page(s) 13-20
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Temperature Change, Physico-Chemical Parameters, Sesame Seed Oil

References
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  • APA Style

    Abdul Ademola Olaleye, Yahaya Alhaji Adamu, Umar Lawan. (2019). Effects of Temperature Change on the Physico-Chemical Properties of Sesame Seed Oil. Science Journal of Analytical Chemistry, 7(1), 13-20. https://doi.org/10.11648/j.sjac.20190701.12

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    ACS Style

    Abdul Ademola Olaleye; Yahaya Alhaji Adamu; Umar Lawan. Effects of Temperature Change on the Physico-Chemical Properties of Sesame Seed Oil. Sci. J. Anal. Chem. 2019, 7(1), 13-20. doi: 10.11648/j.sjac.20190701.12

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    AMA Style

    Abdul Ademola Olaleye, Yahaya Alhaji Adamu, Umar Lawan. Effects of Temperature Change on the Physico-Chemical Properties of Sesame Seed Oil. Sci J Anal Chem. 2019;7(1):13-20. doi: 10.11648/j.sjac.20190701.12

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  • @article{10.11648/j.sjac.20190701.12,
      author = {Abdul Ademola Olaleye and Yahaya Alhaji Adamu and Umar Lawan},
      title = {Effects of Temperature Change on the Physico-Chemical Properties of Sesame Seed Oil},
      journal = {Science Journal of Analytical Chemistry},
      volume = {7},
      number = {1},
      pages = {13-20},
      doi = {10.11648/j.sjac.20190701.12},
      url = {https://doi.org/10.11648/j.sjac.20190701.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjac.20190701.12},
      abstract = {Heating is one of the most commonly used methods of food preparation in homes and industries and prolong use of oil for this purpose causes changes in its physical and chemical properties. The effects of changing temperature on various chemical and physical characteristics of sesame seed oil were studied. The oil was extracted using soxhlet apparatus with n-hexane as extraction solvent. The seeds of sesame (Sesamumindicum) were found to have high oil content. Both the chemical and physical characteristics were investigated within a temperature range of 25-290°C. At room temperature (25°C), the results revealed the chemical characteristics as follows: acid value (AV) (5.61mg/g); peroxide value (PV) (4.42 Meq/kg); free fatty acid (FFA) (5.89%). The physical characteristics were: moisture content (MC) (5.50%); density (0.99g/cm3); refractive index (RI) (1.47). At elevated range of temperatures (170-290°C), there were corresponding changes in both chemical and physical parameters as follows: AV (5.61-5.91mg/g); PV (4.44-6.05 Meq/kg); FFA (5.91-6.06%); MC (3.98-0.71%); density (0.95-0.69g/cm3); RI (1.46-1.40). The study showed that there was gradual increase in chemical properties with increase in temperature whereas, the physical properties decreased gradually with increase in temperature.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Effects of Temperature Change on the Physico-Chemical Properties of Sesame Seed Oil
    AU  - Abdul Ademola Olaleye
    AU  - Yahaya Alhaji Adamu
    AU  - Umar Lawan
    Y1  - 2019/04/01
    PY  - 2019
    N1  - https://doi.org/10.11648/j.sjac.20190701.12
    DO  - 10.11648/j.sjac.20190701.12
    T2  - Science Journal of Analytical Chemistry
    JF  - Science Journal of Analytical Chemistry
    JO  - Science Journal of Analytical Chemistry
    SP  - 13
    EP  - 20
    PB  - Science Publishing Group
    SN  - 2376-8053
    UR  - https://doi.org/10.11648/j.sjac.20190701.12
    AB  - Heating is one of the most commonly used methods of food preparation in homes and industries and prolong use of oil for this purpose causes changes in its physical and chemical properties. The effects of changing temperature on various chemical and physical characteristics of sesame seed oil were studied. The oil was extracted using soxhlet apparatus with n-hexane as extraction solvent. The seeds of sesame (Sesamumindicum) were found to have high oil content. Both the chemical and physical characteristics were investigated within a temperature range of 25-290°C. At room temperature (25°C), the results revealed the chemical characteristics as follows: acid value (AV) (5.61mg/g); peroxide value (PV) (4.42 Meq/kg); free fatty acid (FFA) (5.89%). The physical characteristics were: moisture content (MC) (5.50%); density (0.99g/cm3); refractive index (RI) (1.47). At elevated range of temperatures (170-290°C), there were corresponding changes in both chemical and physical parameters as follows: AV (5.61-5.91mg/g); PV (4.44-6.05 Meq/kg); FFA (5.91-6.06%); MC (3.98-0.71%); density (0.95-0.69g/cm3); RI (1.46-1.40). The study showed that there was gradual increase in chemical properties with increase in temperature whereas, the physical properties decreased gradually with increase in temperature.
    VL  - 7
    IS  - 1
    ER  - 

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Author Information
  • Department of Chemistry, Federal University Dutse, Dutse, Nigeria

  • Department of Chemistry, Federal University Dutse, Dutse, Nigeria

  • Department of Chemistry, Federal University Dutse, Dutse, Nigeria

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