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This research use ethyl alcohol, the ether is the resolver, the acetone is the precipitating agent, after concentration dry obtains the white waxy rough cast lecithin. The use aluminum oxide is the absorbent, uses the chloroform - absolute ethyl alcohol separately; Chloroform - methyl alcohol; Absolute ethyl alcohol - methyl alcohol; Absolute ethyl alcohol. These systems do for the eluent carry on the elution, obtained the best eluent: Chloroform: Methyl alcohol =1: 1 (V/V). Carry on the qualitative appraisal using the silica gel G thin layer chromatographic analysis law and the ultraviolet scanning, with ultraviolet spectrophotometer determination lecithin purity, thus obtains the use aluminum oxide column chromatographic analysis law purification egg-yolk lecithin craft the condition.

This research makes use of ether, B ether is a melting agent, in