{HEAD ~ The invention} relates to {TAIL ~ a method} of isolating sterols in commercial quantities from sterol containing material by subjecting a solution of this material to a column chromatographic separation; for isolating cholesterol from cholesterol containing material, silica gel is preferably used as a column packing and a mixture of, for example, heptane and acetone is preferably used as an eluent 
relates to
{ HEAD ~ The invention } relates to { TAIL ~ a method } of isolating sterols in commercial quantities from sterol containing material by subjecting a solution of this material to a column chromatographic separation ; for isolating cholesterol from cholesterol containing material , silica gel is preferably used as a column packing and a mixture of , for example , heptane and acetone is preferably used as an eluent
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