Research Article
Stereospecific Assay of (R)- and (S)-Goitrin in Commercial Formulation of Radix Isatidis by Reversed Phase High-Performance Liquid Chromatography
Table 3
Contents of (R)- and (S)-goitrin in 9 batches of Banlangen granules (
).
| Sample | (R)-Goitrin (mg/g) | Standard deviation (mg/g) | (S)-Goitrin (mg/g) | Standard deviation (mg/g) | R/S ratio |
| A1 | 0.071 | 0.0009 | 0.037 | 0.0005 | 1.93 | A2 | 0.247 | 0.0040 | 0.174 | 0.0026 | 1.42 | A3 | 0.209 | 0.0019 | 0.183 | 0.0018 | 1.14 | A4 | 0.494 | 0.0114 | 0.429 | 0.0090 | 1.15 | A5 | 0.272 | 0.0044 | 0.199 | 0.0034 | 1.37 | A6 | 0.079 | 0.0008 | 0.056 | 0.0005 | 1.41 | B1 | 0.024 | 0.0002 | 0.018 | 0.0001 | 1.30 | B2 | 0.026 | 0.0002 | 0.020 | 0.0002 | 1.33 | B3 | 0.039 | 0.0004 | 0.030 | 0.0003 | 1.30 |
| Mean | 0.162 | | 0.127 | | 1.37 | RSD (%) | 97.4 | | 106.8 | | 17.0 |
|
|