Test sample of Promethazine hydrochloride tablets related substance in Film-coated tablets
| Column | Welch Ultisil Polar RP 4.6×250，5μm (P/N: 00215-31043) |
| Mobile Phase | Water (Adjust pH to 1.8 with glacial acetic acid): methanol = 55:45 |
| Detector | 254nm |
| Temperature | 30℃ |
| Flow Rate | 1.0ml/min |
| Injection Volume | 20ul |
| Notes | Sensitive to injection volume and dissolved sample solvent |
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