Multistep Plunger Injection Assisted Micellar‐to‐Solvent Stacking for the Determination of Alkaloids From Medicinal Plants Using Capillary Zone Electrophoresis

) ranging from 0.994 to 0.999. The intra-day and inter-day precision of this method was less than 3.701%, and the recovery rates of the analytes ranged from 92.70% to 107.79%, indicating satisfactory accuracy and reliability. Compared with conventional injection techniques, the sensitivity enrichment factors of the four analytes ranged from 42 to 44. The proposed method was validated for its applicability in detecting four alkaloids (fumarine, allocryptopine, tetrahydropalmatine, and corydaline) in Rhizoma corydalis samples.