Determination of avicularin in Polygonum aviculare L. by square wave polarography.

Determination of avicularin in Polygonum aviculare L. by square wave polarography.

Proceedings of the Chinese Academy of Medical Sciences and the Peking Union Medical College = Chung-kuo i hsueh k'o hsueh yuan, Chung-kuo hsieh ho i k'o ta hsueh hsueh pao (1989-01-01)

X Q Zhang, L S Xu

PMID2631115

摘要

A method for the determination of avicularin in Polygonum aviculare L. is described. Square wave polarography (SWP) with a static mercury drop electrode was used to observe the reduction of avicularin. The supporting electrolyte was an acetate buffer solution of pH 4. Avicularin gives a well-defined peak at a potential of -1.30 V (vs. Ag/AgCl). An excellent linear relationship was obtained between the concentration (1.20-3.59 x 10(-6) mol/L) and peak current. The method can be used to analyze small amounts of sample.