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Table 1 Experimental variables for the different extraction methods studied

From: Development and application of green and sustainable analytical methods for flavonoid extraction from Passiflora waste

Extraction method

Variables

Unit

Levels

− 1

0

1

HAE

Sample/Solvent ratio

–

0.05

–

0.1

EtOH/H2O

%

30

–

70

Time

Min

2

–

8

UAE

Sample/Solvent ratio

–

0.05

0.07

0.1

EtOH/H2O

%

30

50

70

Time

Min

15

38

60

MAE

Sample/Solvent ratio

–

0.05

0.07

0.1

EtOH/H2O

%

30

40

50

Time

Min

5

15

25

Temperature

 °C

60

90

120