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Electrochemical Oxidation of Hyperforin on Glassy Carbon Electrode and Determination in Herbal Medicinal Products

✍ Scribed by Astrid Michelitsch; Mario Wurglics

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
212 KB
Volume
15
Category
Article
ISSN
1040-0397

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✦ Synopsis

Abstract

Hyperforin, one of the active components of St. John's Wort and St. John's Wort extracts is oxidized on the glassy carbon electrode. Electrode process, type and reversibility were examined by means of cyclic voltammetry in various buffer systems (NaAc/HAc, Sörensen‐phosphate buffer, borate buffer). A differential pulse voltammetric method was developed for the determination of hyperforin. In the concentration range from 1.0 μg/mL to 40.0 μg/mL there is a strong linearity between the concentration of hyperforin and peak height. The detection limit is 200 ng /mL. The differential pulse voltammetric method developed is used to determine hyperforin in herbal medicinal products.

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