Aqueous extracts of rapeseed meals were separated into four fractions by Sephadex (G25) column chromatography. Fraction I was found to be rich in protein as judged by nitrogen and amino‐acid content and u.v. absorbance at 280 nm. Fraction II contained glucosinolates and peptide‐like materials. Fractions III and IV contained only trace amounts of amino acids and nitrogen. Further separation of fraction IV into three components was achieved by chromatography on silicic acid. Two of the components were shown, by paper chromatography and u.v. absorbance scanning, to be rich in caffeic acid and chlorogenic acid, respectively.
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Lo et al. (1972) studied this question.
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