Quality evaluation of Radix Astragali through a simultaneous determination of six major active isoflavonoids and four main saponins by high-performance liquid chromatography coupled with diode array and evaporative light scattering detectors. - Qi,L.W.; Yu,Q.T.; Li,P.; Li,S.L.; Wang,Y.X.; Sheng,L.H.; Yi,L. (J Chromatogr A, 2006)