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Determination of iodine value of palm oil by fourier transform infrared spectroscopy

Abstract

A rapid method for the quantitative determination of iodine value (IV) of palm oil products by FTIR transmission spectroscopy is described. A calibration standard was developed by blending palm stearin and superolein in specific ratios that covered a range of 27.9 to 65.3 IV units. The spectra of these standards was measured in the range between 3050 and 2984 cm−1, corresponding to the absorption band of=C-H cis stretching vibration. A partial least squares calibration model for the prediction of IV was developed to quantify the IV of palm oil products. A validation approach was used to optimize the calibration with a correlation coefficient of R 2=0.9995 and a standard error of prediction of 0.151. This study concludes that the FTIR transmission approach can be used to determine the IV of palm oil products with a total analysis time per sample of less than 2 min for liquid samples.

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References

  1. 1.

    Rossell, J.B., Classical Analysis of Oils and Fats, in Analysis of Oils and Fats, edited by R.J. Hamilton, and J.B. Rossell, Elsevier Applied Science, London, 1987, pp. 10–12.

    Google Scholar 

  2. 2.

    AOCS, Official Methods and Recommended Practices of the American Oil Chemists’ Society, 4th edn., AOCS Press, Champaign, Additions and Revisions, method Cd 1-25 (1992).

  3. 3.

    Paquot, C., Standard Method for the Analysis of Oils, Fats and Derivatives, 6th edn., Pergamon Press, Oxford, 1979, pp. 66–70.

    Google Scholar 

  4. 4.

    Cocks, L.V., and C. van Rede, Laboratory Handbook for Oil and Fat Analysis, Academic Press, London, 1966, pp. 109–113.

    Google Scholar 

  5. 5.

    Mozayeni, F., G. Szajer, and M. Walters, Determination of Iodine Value Without Chlorinated Solvents, J. Am. Oil Chem. Soc. 73:519–522 (1996).

    Article  CAS  Google Scholar 

  6. 6.

    AOCS, Official Methods and Recommended Practices of the American Oil Chemists’ Society, 4th edn., American Oil Chemists’ Society, Champaign (1989).

    Google Scholar 

  7. 7.

    PORIM, PORIM Test Methods, Palm Oil Research Institute of Malaysia, Ministry of Primary Industries, Malaysia, 1995, pp. 170.

    Google Scholar 

  8. 8.

    AOCS, Official Methods and Recommended Practices of the American Oil Chemists’ Society, 4th edn., Champaign, Method Cd 1c-85 (1990).

  9. 9.

    Gee, P.T., Iodine Value Determination by FTIR Spectroscopy, Mal. Oil Sci. Tech. 4:182–185 (1995).

    Google Scholar 

  10. 10.

    Haryati, T., Y.B. Che Man, H.M. Ghazali, B.A. Asbi, and L. Buana, Determination of Iodine Value of Palm Oil by Differential Scanning Calorimetry, J. Am. Oil Chem. Soc. 74:34–942 (1997).

    Google Scholar 

  11. 11.

    Haryati, T., Y.B. Che Man, H.M. Ghazali, B.A. Asbi, and L. Buana, Determination of Iodine Value of Palm Oil Based on Triglyceride Composition, J. Am. Oil Chem. Soc. 75:789–792 (1998).

    CAS  Google Scholar 

  12. 12.

    Haryati, T., T. Herawan, and L. Buana, Use of Refractive Index for Controlling Iodine Value in the CPO Refinery and Fractionation Plants, in Proceedings of the 1993 PORIM International Palm Oil Congress, Kuala Lumpur, 1993, pp. 141–146.

  13. 13.

    Guillen, M.D., and N. Cabo, Infrared Spectroscopy in the Study of Edible Oils and Fats, J. Sci. Food Agric. 75:1–11 (1997).

    Article  CAS  Google Scholar 

  14. 14.

    Arnold, R.G., and T.E. Hartung, Infrared Spectroscopy Determination of Degree of Unsaturation of Fats and Oils, J. Food Sci., 36:166–168 (1971).

    Article  CAS  Google Scholar 

  15. 15.

    Afran, A., and J.E. Newberry, Analysis of the Degree of Unsaturation in Edible Oils by Fourier Transform Infrared/Attenuated Total Reflectance Spectroscopy, Spectroscopy 6:31–34 (1991).

    CAS  Google Scholar 

  16. 16.

    van de Voort, F.R., J. Sedman, G. Emo, and A.A. Ismail, Rapid and Direct Iodine Value and Saponification Number Determination of Fats and Oils by Attenuated Total Reflectance/Fourier Transform Infrared Spectroscopy, J. Am. Oil Chem. Soc. 69:1118–1123 (1992).

    Article  Google Scholar 

  17. 17.

    Gee, P.T., Superior Quality Control by FT-IR Spectroscopy, in Proceedings of the 1996 International Palm Oil Congress, Kuala Lumpur, 1996, pp. 13–17.

  18. 18.

    Wong, S., T.H. Goh, L.C. Tan, and P.P. Kerk, Recent Developments in Fractionation of Palm Oil, in Proceedings of the 1991 PORIM International Palm Oil Conference, Kuala Lumpur, 1991, pp. 90–96.

  19. 19.

    AOCS, Official and Tentative Methods of the American Oil Chemists’ Society, 14th edn., American Oil Chemists’ Society, Champaign (1990).

  20. 20.

    Dupuy, N., M. Meurens, B. Sombret, P. Legrand, and J.P. Huvenne, Multivariate Determination of Sugar Powder by Attenuated Total Reflectance Infrared Spectroscopy, Appl. Spectrosc. 47:453–457 (1993).

    Article  Google Scholar 

  21. 21.

    Stuart, B., Modern Infrared Spectroscopy, John Wiley & Sons, Ltd., Chichester, 1996, pp. 99.

    Google Scholar 

  22. 22.

    van de Voort, F.R., A.A. Ismail, J. Sedman, and G. Emo, Monitoring the Oxidation of Edible Oils by Fourier Transform Infrared Spectroscopy, J. Am. Oil Chem. Soc. 71:242–252.

  23. 23.

    Fuller, M.P., G.L. Ritter, and C.S. Drapper, Partial-Least Squares Quantitative Analysis of Infrared Spectroscopic Data. Part I: Algorithm Implementation, Appl. Spectrosc. 42:217–227 (1988).

    Article  CAS  Google Scholar 

  24. 24.

    Arakaki, L.S.L., and D.H. Burns, Multispectral Analysis for Quantitative Measurements of Myoglobin Oxygen Fractional Saturation in the Presence of Hemoglobin Interference, Appl. Spectrosc. 46:1919–1928 (1992).

    Article  CAS  Google Scholar 

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Correspondence to Y. B. Che Man.

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Che Man, Y.B., Setiowaty, G. & van de Voort, F.R. Determination of iodine value of palm oil by fourier transform infrared spectroscopy. J Amer Oil Chem Soc 76, 693–699 (1999). https://doi.org/10.1007/s11746-999-0161-9

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Key Words

  • FTIR spectroscopy
  • iodine value
  • palm oil
  • PLS