DETERMINATION OF SOME METHOXYLATED FLAVONES IN CITRUS JUICES BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY

ABSTRACT Five citrus methoxy flavones that have been found to have physiological activities on human erythrocyte can be separated and determined quantitatively by HPLC. Tangerine juice was found to have more nobiletin and tangeretin but lower amounts of the other three known flavones than orange juice. Several other peaks remain to be identified. Characteristic patterns of these juice flavones may be used to determine the presence of one juice in the other.