Table 2. Operation condition of gas chromatography

Conditions
Main body 500 GC system, YL Instrument Co. LTD, Anyang, Korea
Detecter Flame ionization detector (FID)
Column SP-2560 (100 m×0.25 mm×0.2 µm)
Carrier gas N2
Oven tmperature 140℃(5 min) → 1.5℃/min → 200℃(4 min) → 3℃/min → 240℃(15 min)
Inlet temperature 225°C
Detecter temperature 285°C
Injection volume 2 μL