摘要：The paper chromatography of anthraquinone pigments was studied employing five different solvent systems : a) Petroleum benzine saturated with 97% methanol, b) the upper layer of a mixture of petroleum ether-acetone-water (1 : 1 : 3), c) the lower layer of a mixture of acetone-benzene-water (1.5 : 2 : 1), d) petroleum ether saturated with water, and e) butanol saturated with 28% NH4OH. The relationship between the disposition of substituents in the anthraquinone ring and the Rf values was also discussed.
