Table 2.

Conditions of the chromatographic analysis

Detector	Injector temperature	Detector temperature	Column	Carrier gas	Oven temperature programmer
Electron capture detector	280 °C	320 °C	DB-5 60 m × 0.25 mm × 0.25 μm	Helium, flow 1.5 ml He/min	100 °C held for 1 min; 6 °C/min to 140 °C; 2.5 °C/min to 250 °C; 10 °C/min to 310 °C, held for 20 min