Analyses of Total Alkaloid Extract of Corydalis yanhusuo by Comprehensive RP × RP Liquid Chromatography with pH Difference

Figure 2

HPLC separation of Corydalis yanhusuo extract using different pH conditions. (a) Basic conditions using xBridge column under pH 10.5. (b) Acidic conditions using PCP C18 under pH 3.0.

(a)

(b)