Optimization of Extraction and Enrichment of Steroidal Alkaloids from Bulbs of Cultivated Fritillaria cirrhosa

Table 1

Factors and levels of orthogonal experimental design.

Levels	Ethanol concentration (𝐶, v/v%)	Solid-liquid ratio (𝑅, mL/g)	Extraction time (𝑡, min)	Temperature (𝑇, °C)
1	80	5 : 1	60	70
2	90	10 : 1	90	80
3	100	15 : 1	120	90