Table 1.

The K-values of main components in Jiubiying extracts in two-phase solvent systems.

Solvent system (v/v)	K
	Syringin (II)	Syringaresinol 4′,4″-O-β-D-bis- glucopyranoside (I)	Syringaresinol 4′-O-β-D-glucopyranoside (IV)	Pedunculoside (V)
n-Heptane-n-butanol-acetonitrile-water (2:3.8:1.2:4)	0.15	0.01	0.75	15.32
n-Heptane-n-butanol-acetonitrile-water (1:4.4:0.6:4)	0.33	0.01	2.71	71.53
n-Butanol-water (1:1)	0.76	0.13	10.24	165.0
Ethyl acetate-n-butanol-water (4:1:5)	0.12	0.06	0.63	196.3
Ethyl acetate-n-butanol-water (3:2:5)	0.33	0.01	7.88	220.2
Ethyl acetate-n-butanol-water (1:4:5)	0.54	0.10	6.69	66.50
Ethyl acetate-n-butanol-water (1:6:7)	0.66	0.09	10.35	96.48