Table 3

Recovery of seven markers in Gegen Tang sample*
Compounds
 Contents (μg/g)
 RSD% (n = 6)
 Added (μg/mL)
 Obtained (μg/mL)
 Recovery (± RSD %, n = 3)
Puerarin
 3920
 0.61
 3.50
 3.54
 101.20 ± 0.74



8.75
 8.68
 99.26 ± 0.43



13.85
 13.75
 99.41 ± 0.51
Paeoniflorin
 3219
 0.54
 3.63
 3.60
 99.28 ± 1.61



9.07
 8.99
 99.14 ± 1.07



13.27
 13.16
 99.33 ± 0.51
Cinnamic acid
 317
 0.73
 0.27
 0.27
 99.78 ± 1.01



0.68
 0.68
 100.23 ± 1.67



0.87
 0.87
 100.01 ± 1.06
Daidzain
 283
 1.14
 0.19
 0.19
 100.35 ± 1.10



0.48
 0.48
 98.94 ± 1.50



0.78
 0.77
 98.76 ± 0.76
Glycyrrhizin
 4138
 0.55
 3.56
 3.59
 100.92 ± 1.16



8.89
 8.93
 100.54 ± 0.40



16.96
 17.09
 100.73 ± 0.30
Ephedrine
 4283
 0.67
 3.70
 3.74
 101.03 ± 0.83



9.26
 9.30
 100.38 ± 1.34



14.41
 14.29
 99.22 ± 1.35
Pseudoephedrine
 1007
 1.21
 0.50
 0.96
 101.70 ± 1.17



2.37
 2.39
 101.02 ± 2.01



4.19
 4.23
 100.71 ± 0.72

*Sample Batch No. 4 from manufacturer D is used in this experiment.

Song et al. Chinese Medicine 2007 2:7   doi:10.1186/1749-8546-2-7