水平 Level

因素Factors

A (乙醇浓度/%) Ethanol concentration

B (液料比/ml∙g⁻¹) Liquid-solid ratio

C (提取温度/⁰C) Extraction temperature

D (提取时间/h)

Extraction time

1

50

40:1

40

1

2

60

50:1

50

1.5

3

70

60:1

60

2