Table 3. Summary of the results for crocin extraction yield without optimization and optimization from FD2

	Without optimization	Optimization
		Prediction values	After optimization
Raw material ratio (g/100 mL)	3	2.70	2.70
Time (min)	6	5.95	5.95
Solvent concentration (%)	40	41.48	41.48
Ultrasonic amplitude (%)	60	60.41	60.41
Crocin yield (mg · g–1dw)	95.04±0.81	95.65	97.05±0.63

The mean±standard deviation was obtained within five replicates.