Abstract: The ultraviolet spectrophotometry is the common assay for determining total flavones of momordica extract.During the test, some impurities such as the proanthocyanins seriously affect the stability precision and repetition of the results. The standard adding method can eliminate the interference of basal effects. The method is simple, sensitive and rapid and repetition result is good. The linear response range is also wide. Satisfactory results are obtained for determination of total flavones in momordica extract.

Key words: apsorptiophotometry, momordica, total flavones, standard adding method