The GC/MS Analysis of Volatile Components Extracted by Different Methods from Exocarpium Citri Grandis

Table 2

Comparison of extraction parameters among the three extraction methods for volatiles from ECG.

	SD	HS-SPME	SE
Extraction time (min)	300	40	45
Solvent	Water	—	Diethyl ether
Solvent volume (mL)	300	None	90 (30∗3)
Material amount (g)	36	0.2	3
Yield (%)	0.89	NA^a	3.67
Cost b	++	+++	+

aNot available.
^bThe degrees of the economic cost were expressed by “+”.