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Comparison of isopropanol and hexane for extraction of vitamin E and oryzanols from stabilized rice bran

Abstract

The effects of solvent-to-bran ratio (2∶1 and 3∶1, w/w), extraction temperature (40 and 60°C), and time (5, 10, 15, 20, and 30 min) were studied for hexane and isopropanol extraction. Increasing the solvent-to-bran ratios and extraction temperature increased the amounts of crude oil, vitamin E and oryzanol recovered for both solvents. An extraction time of 15 min was sufficient for optimum crude oil, vitamin E, and oryzanol extraction. Preheated isopropanol (3∶1 solvent/bran ratio and 60°C) extracted less crude oil (P<.05) but more vitamin E (P<.05) and similar amounts of oryzanol (P>.05) relative to preheated hexane. The data suggest that isopropanol is a promising alternative solvent to hexane for extraction of oil from stabilized rice bran.

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Hu, W., Wells, J.H., Shin, TS. et al. Comparison of isopropanol and hexane for extraction of vitamin E and oryzanols from stabilized rice bran. J Am Oil Chem Soc 73, 1653–1656 (1996). https://doi.org/10.1007/BF02517967

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  • DOI: https://doi.org/10.1007/BF02517967

Key Words

  • Extraction
  • hexane
  • isopropanol
  • oryzanol
  • rice bran oil
  • vitamin E