Reference substance of impurityC
| Column | Welch Ultisil® HILIC Amide（4.6*250mm，5um） |
| Mobile Phase | Phosphoric acid buffer (dissolve 6.8g potassium dihydrogen in water and diluted to 1000 mL) – acetonitrile = 25:75 |
| Wavelength | 210nm |
| Temperature | 45℃ |
| Flow Rate | 1.0 ml/min |
| Injection Volume | 20 μl |
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