Microwave Assisted Extraction of Defatted Roselle (Hibiscus sabdariffa L.) Seed at Subcritical Conditions with Statistical Analysis

Table 3

Comparison of microwave assisted extraction (MAE) and conventional extractions from previous studies.

Solvent	Extraction yield (%)	Total phenolic content; mg GAE/g extract	Total flavonoid content	Extraction method	Duration (min)	Reference
70% (v/v) ethanol	—	18.3000	—	Maceration	120	Ismail and Yee [14]
Distilled water	—	2.9700	—	Maceration	120	Mohd-Esa et al. [1]
80% (v/v) methanol	—	4.8700	—	Maceration	120	Mohd-Esa et al. [1]
Ethanol	20.1	12.9600	3.1190 mg CE/g extract	Soxhlet	1440	Susanti et al. [3]
70% (v/v) ethanol	63.5	17.9055	14.4251 mg QE/g	MAE	10	This work