Abstract
Sulfur contents in rapeseed oils were determined by reduction with Raney nickel, acidification, and titration of released H2S with mercuric acetate. The sulfur contents decreased with successive steps of industrial processing, i.e., crude oil, 17–31 ppm S; degummed, 16 ppm; alkali refined, 4–9 ppm; bleached, 3–5 ppm; and deodorized, <1 ppm. Laboratory-extracted oil from sound seed contained no detectable sulfur, regardless of the glucosinolate content of the seed. Heating of the seed or addition of water to the seed prior to extraction increased the sulfur in the oil-less, however, for low-glucosinolate seed than for high-glucosinolate seed. Laboratory-extracted oils from green, frost-damaged, and bin-heated seed contained appreciable amounts of sulfur.
Similar content being viewed by others
References
von Fellenberg, T., Mitt. Lebensm. Hyg. 36:355 (1945); C.A. 40:36248.
Babuchowski, K., and A. Rutkowski, Seifen Öle Fette Wachse 95:27 (1969).
Babuchowski, K., and A. Rutkowski, Ibid. 95:381 (1969).
Moser, H.A., C.D. Evans, G. Mustakas, and J.C. Cowan, JAOCS 42:811 (1965).
Kucera, Z., and M. Hejtmanek, Prum. Potravin 8:199 (1957); C.A. 51:12511c.
Zeman, I., and D. Zemanova, Tluszcze Jadalne 11:111 (1967).
Franzke, C., R. Göbel, and E. Holstein, Nährung 16:867 (1972); C.A. 79:4019s.
Kurucz, E., and J. Peredi, Proc. 4th Int. Rapeseed Conf., Giessen, Germany, Deutsche Gesellschaft für Fettwissenschaft, Münster, June 1974, p. 363.
Göbel, R., and C. Franzke, Lebensm. Ind. 22:30 (1975); C.A. 83:7236d.
Granatelli, L., Anal. Chem. 31:434 (1959).
Baltes, J., Fette Seifen Anstrichm. 69:67 (1967).
Babuchowski, K., and R. Zadernowski, Tluszcze Jadalne 14:140 (1970).
Fensom, A., N. Roberts, and G.M.S. Duff, Analyst 96:186 (1971).
Troëng, S., JAOCS 32:124 (1955).
Wronski, M., and E. Bald, Chem. Anal. (Warsaw) 14:173 (1969); C.A. 70:120902n.
Andre, E., M. Carbouères, and M. Maille, C.R. Acad. Sci. (Paris) 236:1819 (1953); C.A. 48:6716b.
Norris, F.A., in “Bailey's Industrial Oil and Fat Products,” Edited by D. Swern, Interscience Publishers, New York, NY, 1964, pp. 637–710.
Author information
Authors and Affiliations
Additional information
Contribution No. 403, Department of Plant Science, University of Manitoba.
About this article
Cite this article
Daun, J.K., Hougen, F.W. Sulfur content of rapessed oils. J Am Oil Chem Soc 53, 169–171 (1976). https://doi.org/10.1007/BF02633296
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02633296