Table 1 Analytical parameters of GC-MS

GC (7890B)

Inlet

Split mode (50:1)

Inlet temperature

250 °C

Carrier gas

Helium (flow rate 1 mL/min)

Inlet pressure

14.69 psi

Column

DB-5MS column (20 m × 180 μm × 0.18 μm)

Oven program

70 °C (2 min)→20 °C/min→200 °C (0 min)→7 °C/min→300 °C (2 min))→25 °C/min→310 °C (1 min)

Run time

26.186 min

MS (5975C)

Transfer line

230 °C

Source temperature

230 °C

Quad temperature

150 °C

Mode

Scan

Scan range

43–550 m/z