Enrichment of the Glycyrrhizic Acid from Licorice Roots (Glycyrrhiza glabra L.) by Isoelectric Focused Adsorptive Bubble Chromatography

Table 1

Regression equation, retention time, and correlation coefficient of reference compounds on HPLC.

Number	Sample concentrations (mg/L) (ppm)	Retention time (min)	Regression equation	Correlation coefficient ()
(); (); (); ()	138; 207; 276; 355	3.04	= 0.0016  −  21.842	0.9917

⁢: peak area of components, : concentration of components.