Article ID Journal Published Year Pages File Type
1217982 Journal of Chromatography B 2006 5 Pages PDF
Abstract

20-Hydroxyecdysone (20E) is effective in stimulating protein synthesis, therefore, it has been largely used as anabolic agent in several commercial formulas. Phytochemical study of methanolic extract of twigs from Vitex polygama, used in traditional Brazilian medicine as emenagogue, yielded a large quantity of 20E. This finding led us to developing and validating a simple and reliable method to determine 20E in the surveyed extract. Chromatographic separation of 20E was achieved on a phenyl-hexyl-based column using reversed elution mode. Extract was cleaned-up by solid phase extraction employing C18 cartridge, and an absolute recovery of 97% was acquired. External standard and standard addition calibration graphs were obtained and good linearity was accomplished (r > 0.999 for both curves). The limit of quantification and detection were determined. The results for accuracy fell within the −5 to +7% range.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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