Optimization of Deep Eutectic Solvents Extraction of Effective Components from Phellodendron chinense Schneid by Response Surface Methodology

Table 3

Response surface test factor level of PcS extraction process.

Level	Factors
	Ultrasonic power/W	Ultrasonic time/min	Ultrasonic temperature/°C	Vortex time/min
−1	200	20	40	3
0	300	30	50	5
1	400	40	60	7