Discrimination of Salvia miltiorrhiza Bunge from Different Geographical Locations Employing High-Performance Liquid Chromatography, Near-Infrared Fingerprinting Combined with Chemometrics

Table 1

Orthogonal experiment for S. miltiorrhiza extraction.

The serial number	Solvent	Time (min)	Method
1	50% methanol	40	Ultrasound-assisted extraction
2	50% methanol	50	Soxhlet extraction
3	50% methanol	60	Soak at room temperature
4	Dilute alcohol	40	Soxhlet extraction
5	Dilute alcohol	50	Soak at room temperature
6	Dilute alcohol	60	Ultrasound-assisted extraction
7	70% methanol	40	Soak at room temperature
8	70% methanol	50	Ultrasound-assisted extraction
9	70% methanol	60	Soxhlet extraction