2Liu,M. -H. ,Tong,X. ,Wang,J. -X. et al. Rapid separation and identification of multiple constituents in traditional Chinese medi- cine formula Shenqi Fuzheng Injection by ultra -fast liquid chroma- tography combined with quadrupole - time - of - flight mass spec- trometry[ J ]. Journal of Pharmaceutical and Biomedical Analysis, 2013,74 : 141 - 155.