Abstract
In the near-infrared (NIR) spectra of oil, information about fatty acid composition is concentrated in the range of 1600–2200 nm. Principal-component analysis (PCA) was applied on the standardized full NIR spectral data of this region for vegetable oils to totally capture the NIR spectral pattern. Nine varieties of vegetable oils (soybean, corn, cottonseed, olive, rice bran, peanut, rapeseed, sesame and coconut oil) could be successfully classified from their PCA scores. Examining the contribution of wavelengths to PCA scores showed that wavelengths with a high loading weight were assigned to characteristic absorption regions that correspond to specific fatty acid moieties. This classification is related to the fatty acid composition of an oil, and it can be carried out rapidly and easily after eigenvectors were obtained.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Osborne, B.G., and T. Fearn,Near-Infrared Spectroscopy in Food Analysis, Longman Scientific & Technical, Harlow, 1986.
Williams, P.C., and K. Norris (eds.),Near-Infrared Technology in the Agricultural and Food Industries, American Association of Cereal Chemists, St. Paul, 1987.
Burns, D.A., and E.W. Ciurczak (eds.),Handbook of Near-Infrared Analysis, Marcel Dekker, Inc., New York, 1992.
Wold, S., K. Esbensen and P. Geladi, inChemometrics Tutorials, edited by D.L. Massart, R.G. Brereton, R.E. Dessy, P.K. Hopke, C.H. Spiegelman and W. Wegscheider, Elsevier Science Publishers, Amsterdam, 1990, pp. 209–224.
Cowe, I.A., and J.W. McNicol,Appl. Spectros., 39:256 (1985).
Cowe, I.A., J.W. McNicol and D.C. Cuthbertson,Analyst 113:269 (1988).
Bertrand, D., P. Robert and W. Loisel,J. Sci. Food Agric. 36:1120 (1985).
Bertrand, D., M. Lila, V. Furtoss and P. Robert,Ibid. 41:299 (1987).
Downey, G., P. Robert, D. Bertrand and P.M. Kelly,Appl. Spectrosc. 44:150 (1990).
Robert, P., D. Bertrand and M.F. Devaux,Anal. Chem. 59:2187 (1987).
Sato, T., S. Kawano and M. Iwamoto,J. Dairy Sci. 73:3408 (1990).
Sato, T., S. Kawano and M. Iwamoto,J. Am. Oil Chem. Soc. 68:827 (1991).
Chikuni, K., S. Ozawa, T. Mitsuhashi, M. Mitsumoto, T. Koishikawa, S. Kato and K. Ozutsumi,Jpn. J. Zootech. Sci. 60:29 (1989).
Tanaka, Y., T. Tarumi and K. Wakimoto (eds.), inHandbook of Statistical Analysis by Personal Computer, Vol. 2, Multivariate Analysis (in Japanese), Kyoritsu, Tokyo, 1984, pp. 160–175.
Author information
Authors and Affiliations
About this article
Cite this article
Sato, T. Application of principal-component analysis on near-infrared spectroscopic data of vegetable oils for their classification. J Am Oil Chem Soc 71, 293–298 (1994). https://doi.org/10.1007/BF02638055
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02638055