journal6 ›› 2004, Vol. 25 ›› Issue (4): 49-52.

• Key disciplines • Previous Articles     Next Articles

Study on Extraction Technology of Yellow Pigment From Oenothera Brennis L.Flower


  1. (1.Collage of Chemistry and Chemical Engineering,Jishou university,Jishou  416000,Hunan China;2.School of Physical Education of Western Hunan,Jishou 416000,Hunan China)
  • Online:2004-12-15 Published:2012-09-22

Abstract: The extraction conditions of yellow pigment from Oenothera brennis.L flower were studied.The extraction effects by pure ethanol,95% alcohol,ether,acetone,ethyl ethanoate,petroleum benzene were compared,and the result indicated that 95% alcohol was the optimum solvent.the maximum absorption wavelength(λmax) of the 95% alcohol being 394 nm.Mono-factor experiments and orthogonal experiments showed that the experiment temperature could have a greater impact on extraction of the yellow pigment than the ratio of the solvent to petal and extraction time of solvent.The result showed that the optimum conditions are the following:the extraction reagent 95% alcohol,the petal and 95% alcohol  were put in container with the ratio of 0.2∶30(g/mL) then heated at 60 ℃ for 4 h.

Key words: Oenothera brennis L.flower, yellow pigment, extraction technology

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