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Planta Med 1972; 22(6): 152-156
DOI: 10.1055/s-0028-1099598
© Georg Thieme Verlag Stuttgart · New York

OXIDATION AND DETERMINATION OF NODOSIN BY HEXACYANOFERRATE (III)

S. A. I. Rizvi, Tajwar Sultana, S. N. Tripathi
  • Chemical Laboratories, University of Allahabad, India
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Publication Date:
15 January 2009 (online)

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Abstract

Nodosin, a new anthraquinone from the flowers of Cassia nodosa, has been determined in microamounts by oxidation with potassium hexacyanoferrate (III) in alkaline medium. The oxidation required 10 moles of oxidant per mole of the quinone with the production of formic, acetic and maleic acids, 2,6–dihydroxy–toluene and carbon dioxide. The oxidation products were identified and the conditions of stoichiometry have been studied. The mean error was found to be 2.3 %.