Table 2.

Analytical conditions for analysis of ethyl carbamate using GC/MS

Parameter	Analytical condition
Column	DB-WAX column (30 m × 0.25 mm, I.D. 0.25 μm film thickness)
Column temperature	0.75 min at 40 °C, increase to 60 °C at 10 °C/min, and increase to 150 °C at 3 °C/min and hold for 5 min
Mass spectrometer	Ion source 200 °C Electron impact ionization potential 70 eV Select ion mode(m/z; 62, 74, 89)
Mobile phase	He gas
Flow rate	0.9 mL/min
Injection volume	1 μL
Injection mode	Splitless