| Item | Condition |
|---|---|
| Instrument | Agilent 6890N, Agilent Technologies, USA |
| Column | Omegawax250 (30m × 0.25 mm id, 0.25 μm film thickness; Supelco, Bellefonte, PA, USA) |
| Detector | Flame Ionization Detector |
| Carrier gas | Helium (99.99%, Research purity) |
| Column flow rate | 1.0 mL/min |
| Split ratio | 100:1, 1 μL (Injection volume) |
| Injection port temperature | 250°C |
| Detection port temperature | 260°C |
| Oven temperature | 150°C, hold for 2min |
| 4°C/min up to 220°C, hold for 30min |