Citric Acid, Acetic Acid, L-malic Acid on Ultisil LP-C18
Mixed standard
| Column | Welch Ultisil LP-C18 4.6×250mm，5μm (P/N: 00208-31043) |
| Mobile Phase | 20Mmol/L KH2PO4 adjusted to pH 2.20 with phosphoric acid |
| Detector | 210 nm |
| Temperature | 30°C |
| Flow Rate | 1.0 ml/min |
| Injection Volume | 20µl |