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Table 3 Recovery of seven markers in Gegen Tang sample*

From: Simultaneous determination of multiple marker constituents in concentrated Gegen Tang granule by high performance liquid chromatography

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