Chromatographic conditions
The carrier gasHelium; The flow rate of carrier gas 20 mL·min-1
Column pressure: 8×105 Pa; The split ratio: 10:1
By step heating increasing the column temperature from 100 to 250
Column temperature: 100 (keeping for 2 min), 5/min rising to 150 (keeping for 2 min), 8/min rising to 250 (keeping for 10 min)
Mass spectrometric conditions
GC/MSD Interface temperature : 280Ion source temperature230; Quadruple temperature150
Electron energy70 eV Full scan mass range (SCAN) 50~500 aum; Selected ion monitoring mode: 73 m/z90 m/z.