Quantification of β-ecdysone in differents parts of Pfaffia glomerata by HPLC

摘要

Pfaffia glomerata (Spreng.) Pedersen, Amaranthaceae, is widely distributed in Brazil. Roots are considered as the world's greatest supplier and β-ecdysone is the most important compound extracted from roots of Pfaffia glomerata. So, the aim this study was analyze the presence of β-ecdysone in the inflorescences and stems and compared with the content from roots of Pfaffia glomerata and determine the best extractive method of β-ecdysone this plant. The crude extracts were obtained by Soxhlet method, reflux, maceration, percolation and turbolyse. Compound extracts were quantified by High Performance Liquid Chromatography (HPLC). The analysis were carried out a Phenomenex Column C18, 5 μm, 250x4,6mm, maintened at 30 oC, gradient system using as mobile phase a mixture of methanol and water, flow rate 1,0 mL and detection at 245 nm. Results showed Soxhlet method with ethanol:water (90:10 v/v) presented the higher concentration of β-ecdysone in P. glomerata and inflorescences showed higher amount of this active substance (3,06%), compared with stems (2,37%) and roots (1,63%), showing that the inflorescences and plant stems may also be used as a rich source of β-ecdysone.