|
| GC/MS parameter | Component or setting |
|
| Gas chromatograph | Agilent 6890 N |
| Mass detector | Agilent 5973 |
| Column | HP-5MS (30 m × 0.25 mm id, 0.25 μm) |
| Carrier gas | Helium |
| Purge flow and time | 25.5 mL/min at 1.5 min |
| Injection | 1-μL splitless or split with different split ratios (up to 80 : 1). Pulsed pressure injection (40 psi for 0.8 min) |
| Inlet temperature | 325°C |
| Column temperature program | 40°C (2 min)
30°C min−1 to 325°C (hold 7 min) |
| Detector temperature | 230°C source
150°C quadrupole |
| MSD transfer line | 325°C |
|