Table 3 Samples in each vertical slice and the content of six anthraquinone glycosides in rhubarb (mg/g)

Slice 1

3900–3360

DH-05,08,09,20,21

13.53±3.10

9.07±2.19

3.74±1.64

10.83±4.07

16.58±17.52

8.10±6.91

61.85±17.79

Slice 2

3360–2820

DH-03,11,18,19,25

8.92±4.24

11.86±4.42

3.06±1.98

9.54±6.50

7.87±3.92

7.45±3.94

48.69±19.73

Slice 3

2820–2280

DH-01,02,03,07,12,13,16,17,22,24,26,

6.79±4.40

7.29±4.47

1.97±1.17

5.33±1.86

6.65±4.73

3.89±3.29

31.93±15.89

Slice 4

2280–1740

DH-06,15,27

3.13±2.33

7.11±4.90

0.79±0.86

2.94±1.24

5.74±1.24

2.01±2.42

21.72±12.57

Slice 5

1740–1200

DH-10,14.23

3.36±2.93

3.91±3.10

0.58±1.00

2.47±2.39

2.68±2.32

1.49±1.89

14.49±11.98