Research Article

Preliminary Studies on Liquiritin, Deoxyschizandrin, and Tanshinone II A as Potential Anti-Neurodegenerative Disease Agent: Determination by Reverse-Phase Liquid Chromatography in Tianwang Buxin Pills

Table 8

Contents of liquiritin, deoxyschizandrin, and tanshinone II A by the internal standard and external standard method in eight batches of TWBXP samples (n = 6, mean ± S.D.).

NumberContent (mg/g)
Analysis methodLiquiritinDeoxyschizandrinTanshinone II A

17052802External standard0.16 ± 0.010.15 ± 0.010.49 ± 0.01
Internal standard0.22 ± 0.010.28 ± 0.010.67 ± 0.01
17053803External standard0.14 ± 0.020.12 ± 0.020.42 ± 0.01
Internal standard0.19 ± 0.020.22 ± 0.020.58 ± 0.01
17070507External standard0.15 ± 0.010.11 ± 0.030.47 ± 0.01
Internal standard0.20 ± 0.010.19 ± 0.030.64 ± 0.01
17091903External standard0.17 ± 0.020.13 ± 0.020.41 ± 0.02
Internal standard0.23 ± 0.020.23 ± 0.020.55 ± 0.02
17102402External standard0.16 ± 0.010.14 ± 0.010.45 ± 0.01
Internal standard0.22 ± 0.010.21 ± 0.010.53 ± 0.01
17015269External standard0.15 ± 0.010.12 ± 0.020.40 ± 0.02
Internal standard0.20 ± 0.010.20 ± 0.020.56 ± 0.02
17055293External standard0.13 ± 0.010.11 ± 0.030.38 ± 0.03
Internal standard0.17 ± 0.010.25 ± 0.030.50 ± 0.03
18015225External standard0.11 ± 0.010.11 ± 0.030.36 ± 0.03
Internal standard0.14 ± 0.010.19 ± 0.030.61 ± 0.03