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Determination of rotenone in Lonchocarpus root and oleo-resin

✍ Scribed by D. V. Richmond; J. T. Martin

Publisher
John Wiley and Sons
Year
1959
Tongue
English
Weight
420 KB
Volume
10
Category
Article
ISSN
0022-5142

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✦ Synopsis

Abstract

The rotenone content of Lonchocarpus root and of the oleo‐resin have been determined by a standard method of direct crystallisation of the carbon tetrachloride solvate and also by the crystallisation of the solvate after the partial removal of other components by alkali extraction or column chromatography. The highest results were given by the chromatographic method and the lowest by the direct crystallisation procedure. Evidence is presented that direct crystallisation gives results that may be 20% lower than the true values, and revision of the standard method is desirable.

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