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  • Title: [Determination of epicatechin in Rhizoma Fagopyri dibotoryis by HPLC-ECD].
    Author: Xin MT, Yang B, Li H, Huang LQ.
    Journal: Zhongguo Zhong Yao Za Zhi; 2006 Jan; 31(2):117-9. PubMed ID: 16570795.
    Abstract:
    OBJECTIVE: To establish a quantitative method of determination of epicatechin in Rhizoma fagopyri dibotoryis by HPLC-electrochemical detection. METHOD: The sample was separated on a column of Diamonsil C18 (4.6 mm x 250 mm, 5 microm) which was eluted with methanol-0.1 mol x L(-1) phosphate buffer (1:3, pH 2.5), the flow rate was 1.0 mL x min(-1), the column temperature was 35 degrees C, the reference electrode was ISAAC (in-situ silver/silver chloride), the work electrode was glassy carbon, the applied potential was + 600 mV. RESULT: The linear range of epicatechin was 0.004 875-1.56 microg, r = 0.999 9. The average recovery was 100.7% with RSD 1.9% (n = 5). The content of epicatechin was different in nine samples purchased. CONCLUSION: The method is good reproducible and can be used to determine epicatechin in Rhizoma fagopyri dibotoryis.
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