GC (Agilent 7890 A gas chromatograph)

MS (Waters GCT Premier TOF mass spectrometer)

Column

DB-5MS (30 m × 0.25 mm × 0.25 μm)

Ionizing mode

Electron ionization (EI)

Oven temp

Start temp.: 60˚C, 3.0 min hold

10˚C/min to 320˚C, 10 min hold

Source temp.

250˚C

Interface temp

280˚C

Electron voltage

70 Ev

Injection mode

Splitless

Detector voltage

2300 V

Injector temp

280˚C

Carrier gas

He (99.999%)