Preparation, Characterization, and Dissolution Rate In Vitro Evaluation of Total Panax Notoginsenoside Nanoparticles, Typical Multicomponent Extracts from Traditional Chinese Medicine, Using Supercritical Antisolvent Process

Table 1

The factors and levels of the orthogonal array design.

Factor
	Concentration of TPNS solution (mg/mL)	Precipitation temperature (°C)	Precipitation pressure (MPa)	TPNS solution flow rate (mL/min)
Levels
1	2.5	40	10	3.3
2	7.5	50	15	6.6
3	12.5	60	20	9.9
4	17.5	70	25	13.2