Table 1 Linear regression and MRM parameters of standards

Loganic acid

y = 2099.0x + 19518.7

50-500

0.9996

0.34

1.01

421 > 375

27

Loganic acid^a

y = 200150.0x + 2801.4

0.05-5

0.9997

0.004

0.022

421 > 213

22

Swertiamarin

y = 2151.2x + 11429.0

10-150

0.9998

0.27

0.92

419 > 179

18

Swertiamarin^a

y = 169057.0x + 3753.2

0.1-5

0.9995

0.005

0.027

419 > 141

23

Gentiopicroside

y = 1494.4x + 21722.0

5-1500

0.9995

0.23

1.03

401 > 197

14

-

-

-

-

-

-

401 > 89

21

Sweroside^a

y = 292679.0x + 5034.6

0.5-10

0.9992

0.008

0.037

359 > 197

−31

-

-

-

-

-

-

359 > 127

−10

Isoorientin

y = 2945.4x-6172.4

5-250

0.9993

0.57

2.33

447 > 327

27

Isoorientin ^a

y = 278957.0x + 4532.8

0.05-5

0.9994

0.007

0.041

447 > 357

23

Isovitexin

y = 1979.7x + 19518.7

5-250

0.9998

0.63

1.97

431 > 311

24

Isovitexin ^a

y = 409813.0x + 1523.7

0.05-5

0.9996

0.007

0.037

431 > 331

22