Microwave-Assisted Extraction Studies of Target Analyte Artemisinin from Dried Leaves of Artemisia annua L.

Table 2

Influence of mesh, solvent volume, time, and power of microwave irradiation on recovery of artemisinin.

Solvent	Material to solvent ratio	Particle size; (Mesh)	Irradiation time/cycle; (Second)	Irradiation power (Watt)	% Mean artemisinin recovered (±SD); (% dry weight)^b  n = 3	% RSD
Acetone^a	100 mg : 5 mL	14	60	160	0.63 (±0.01)	1.59
Acetone	100 mg : 5 mL		60	160	0.64 (±0.02)	2.40
		25	60	320	0.64 (±0.02)	3.13
			120	160	0.69 (±0.01)	0.84
Acetone	100 mg : 10 mL		60	160	0.71 (±0.01)	1.63
		25	60	320	0.69 (±0.02)	2.90
			120	160	0.73 (±0.01)	1.37

aTaken from Table 1 as a control value to analyze the effect of mesh size on artemisinin recovery.
bTwo cycles of extraction were carried out in each case.