Ding L, Zhang Z, Chen Y
Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing.
Zhongguo Zhong Yao Za Zhi. 1995 Jun;20(6):349-50, 383.
Extracted by n-butanol and separated by two-dimensional TLC, the astragalus saponin 1 in Suanqi Oral Liquid was determined by vanillin-perchloric acid colorimetric method. The recovery and RSD were 96.3% (n = 5) and 0.75% respectively.