A Photoelectric Colorimetric Method for the Estimation of Khellin

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Abstract
Summary: A photoelectric colorimetric method for the assay of khellin is described. This method is recommended for the assay of pure khellin in pharmaceutical preparations. The assay is carried out within the limits of 0ṁ1 to 1 mg. of khellin. Work is proceeding for the application of this method on galenical and other pharmaceutical preparations. The results will be compared with those obtained by the other colorimetric methods. The authors wish to express their thanks to the Memphis Chemical Co. for the help extended to them in carrying out this work and for the supply of pure khellin and instruments involved.

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