Table 1: Optimized precursor/production pairs and multiple reaction monitoring (MRM) parameters for the analytes and IS.

Analytem/zDP/VCE/eV

Baicalin447.1→271.09530
Baicalein271.0→123.019044
Wogonoside461.1→285.09028
Wogonin285.0→270.013034
Berberine337.8→294.08038
Palmatine353.9→322.15054
Jatrorrhizine339.1→295.010027
Icariin(IS)677.3→369.120070
Tetrahydropalmatine(IS)357.2→192.121035