HPLC-DAD/ESI-MS in analyzing chemical constituents of Rhizoma belamcanda / 第二军医大学学报

ABSTRACT

Objective: To analyze the chemical constituents of Rhizoma belamcandae by using high-performance liquid chromatography-diode array detector/electrospray ionization-mass spectrometry (HPLC-DAD/ESI-MS). Methods: Dried Belamcanda chinensis powder was extracted with 70% ethanol by sonication. The chromatographic separation was performed on a YMC ODS-C18 column (250 mm X 4.6 mm I. D., 5 μm) with a mobile phase composed of 20%CH 3OH(A)-70%ACN(B) (0→ 30→45→65 min, 20→30→90→100 B), eluted at a flow rate of 0.45 ml/min, and the UV detection wavelength was set at 265 nm. Positive ionization mode with a needle voltage of 5 000 V, a capillary voltage of 20 V, a gas (N2) press of 20 psi and a temperature of the drying gas of 300°C was selected. Relative molecular mass data acquisition was performed from m/z 250 to 550 in full MS scan mode. Results: Nine major isoflavones were identified from Rhizoma belamcandae based on their retention behavior obtained on-line by their UV spectra and the HPLC-DAD/ESI-MS. Conclusion: A rapid and efficient HPLC-DAD/ESI-MS method for identifying the chemical constituents of Belamcandae chinensis has been established, which provides more scientific information for quality control of Rhizoma belamcandae.