Marker
Concentration
(ng/ spot)
Intra-day precision*
Inter-day precision*
Bergenin
400
3.12
3.15
480
2.62
1.90
560
4.26
4.27
(+)-Catechin
1.04
0.85
2.5
3.05
0.35
2.43
Gallicin
320
1.83
0.97
1.20
1.25
640
0.61
1.45
Gallic acid
1.56
0.64
1.57
1.27
1.14
0.58
β-Sitosterol
80
0.15
0.26
160
0.52
0.43
240
0.46