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Comparison of isopropanol and hexane for extraction of vitamin E and oryzanols from stabilized rice bran
Author(s) -
Hu Weicheng,
Wells John Henry,
Shin TaiSun,
Godber J. Samuel
Publication year - 1996
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02517967
Subject(s) - hexane , rice bran oil , bran , solvent , extraction (chemistry) , chemistry , chromatography , vitamin e , vitamin , solvent extraction , organic chemistry , raw material , biochemistry , antioxidant
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.