Evaluation of extraction protocols for anti-diabetic phytochemical substances from medicinal plants

Table 1 Comparison of percentage recovery yield, extraction time and volume of solvent used for the different extraction methods for the two plants

	Vernonia amygdalina			Ocimum gratissimum
Parameter	MAE	Soxhlet	Maceration	MAE	Soxhlet	Maceration
Sample (g)	50	50	50	50	50	50
Solvent volume (mL)	250	500	900	250	500	900
Extraction time (min)	39	265	4320	39	255	4320
Recovery yield (g)	10.45 ± 0.53b	7.88 ± 0.35a	7.18 ± 0.14a	9.55 ± 0.84b	5.63 ± 0.21a	5.08 ± 0.32a
Percentage recovered (%)	20.90 ± 1.05b	15.75 ± 0.71a	14.35 ± 0.28a	19.10 ± 1.67b	11.25 ± 0.24a	10.15 ± 0.65a

Values are mean ± SD of 3 replicate determinations; same superscript across the column under the same plant indicate no significant difference (P > 0.05). MAE: Microwave-assisted-extraction.