Abstract
A method of quantitative analysis of Cascara Sagrada preparations dependent upon the isolation of the hydroxy‐methyl‐anthraquinones on a chromatographic column of magnesium oxide and celite was devised. The anthraquinones were quantitatively eluted from the column and the concentration of the resulting solutions determined from the results of spectrophotometric examinations. Calculations of concentration of total anthraquinones were made on the basis of a determined extinction coefficient for pure emodin. The results of the analyses of fluidextracts by this method gave results correlating quite closely those previously reported in the literature for a different process.
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