α	Selectivity factor
AA	Acetic acid
ACN	Acetonitrile
DMSO	Dimethyl sulfoxide
DW	Distilled water
FA	Formic acid
GC–MS	Gas chromatography with mass spectrometry
HPLC–DAD	High-performance liquid chromatography combined with a diode array detector
k ′	Capacity factor
KIOM	Korea Institute of Oriental Medicine
LC-MS	Liquid chromatography–tandem mass spectrometry
LOD	Limit of detection
LOQ	Limit of quantification
MeOH	Methanol
N	Number of theoretical plates
OCE	Oncheong-eum
PA	Phosphoric acid
r 2	Coefficient of determination
Rs	Resolution
RSD	Relative standard deviation
Tf	Tailing factor
TFA	Trifluoroacetic acid
UPLC	Ultra-performance liquid chromatography