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Table 1

The chromatographic conditions

ParameterDescription
Injection mode Split-less mode 
Temperature of injector 280 °C 
Column DB-1 (30 m × 0.32 mm × 1 μm) GC capillary column 
Flow rate of helium 1.5 mL/min 
Temperature program Started from 40 °C for 1 minute then heated up to 300 °C with a heating rate of 10 °C/min with holding time of 1 minute 
FID detector temperature 300 °C 
Flow of air 300 mL/min−1 
Flow of hydrogen 30 mL/min 
Flow of makeup gas (nitrogen) 15 L/min 
ParameterDescription
Injection mode Split-less mode 
Temperature of injector 280 °C 
Column DB-1 (30 m × 0.32 mm × 1 μm) GC capillary column 
Flow rate of helium 1.5 mL/min 
Temperature program Started from 40 °C for 1 minute then heated up to 300 °C with a heating rate of 10 °C/min with holding time of 1 minute 
FID detector temperature 300 °C 
Flow of air 300 mL/min−1 
Flow of hydrogen 30 mL/min 
Flow of makeup gas (nitrogen) 15 L/min 
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