Table 1 Calibration curve and correlation coefficients of standard flavonoids detected by HPLC

Catechin

8.2

y = 11.231x + 0.001

0.999

0.5

0.9

0.31

0.13

Epicatechin

10.35

y = 30.28x + 0.01

0.997

3.5

0.5

0.6

0.05

Quercetin

14.25

y = 64. 12x + 5

0.993

7.8

11.32

1.9

0.02

Vitexin

19.9

y = 39.88x + 3.1

0.9676

0.35

0.7

O.29

0.03

Diosmin

20.85

y = 36.493x + 5.1

0.9919

0.4

0.37

0.04

0.03

Rutin

21.58

y = 24.086x + 4.50

0.9954

7.8

1.2

2

0.09

Genestin

27.35

y = 54.06x + 0.02

0.989

5.6

0.2

0.44

0.1

Myricetin

41.30

y = 79.918x + 0.002

0.9983

5

1.3

0.31

0.22

Daidzein

44.73

y = 85.73x + 1.2

0.9858

1.2

0.11

0.27

0.06

Luteolin

47.04

y = 46.21x + 2.3

0.9989

3.4

0.28

0.43

0.04

Naringenin

49.31

y = 94.712x + 1.4

0.9817

1.7

0.15

0.19

0.024

Apigenin

50.33

y = 127.87x + 1.6

0.9918

13.3

0.65

0.7

0.29

Kaempferol

50.75

y = 111.77x + 2.9

0.9982

1.0

0.15

0.1

0.027

Pinocombrin

55.85

y = 111.552x + 3.3

0.9954

5.55

0.78

0.8

0.198

Phenol

 Gallic acid

10.38

y = 11.96x + 0.12

0.999

1.6

1.9

0.1

0.2

 Caffeic acid

14.8

y = 91.557x + 5

0.9978

3.1

2

0.5

0.16

 Chlorogenic

19.6

y = 112.90x + 2.3

0.972

1.8

1.9

0.6

0.35

 Hydroxybenzoic

22

y = 48.86x + 5.3

0.99

5.6

9.9

0.89

0.89

 Coumaric

22.87

y = 248.72x + 0.01

0.995

5.4

2

1.3

0.11

 Ferulic

28.26

y = 102.42x + 2

0.9976

6.5

3.8

1.9

0.22

 Rosmari

29.02

y = 67.16x + 0.001

0.98

2.0

4.1

0.7

0.34

 Sinalic

34.26

y = 120.9x + 0.45

0.999

9.6

1

1.7

0.08

 Salicylic acid

34.04

y = 27.482x + 0.2

0.9972

3.4

9.8

0.7

1.1

 Cinnamic

37.96

y = 168.96x + 3.2

0.9977

9.1

3.1

1.9

0.22

 Resveratrol

43.3

y = 144.02x + 4.1

0.9659

5.4

9.9

0.5

0.99