GC conditions MS conditions
Column DB-5MS, 60 m × 0.32 mm × 1.0 µm Ion source temperature (°C) 230
Carrier gas Helium (>99.999%) Quadrupole temperature (°C) 150
Flow rate (ml/min) 1.5 Interface temperature (°C) 280
Injector Splitless Range of mass (amu) 15-300
Column temperature (°C) 35 (5min) → 150 (5°C/min) → 220 (15°C/min, 7min) Scan rate (s/scan) 0.2
Inlet temperature (°C) 100 Energy of electron ionization source (eV) 70
Table 2: The GC/MS conditions for breath gas analysis.
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