Carrier gas was helium with flow rate of 1 ml/min. Oven temperature was kept at 60 ◦C for 10 min, and programmed to 250 ◦C at a rate of 3 ◦C/min, then isothermal at 250 ◦C for 5 min.
Carrier gas was helium with flow rate of 1 ml/min. Oven temperature was kept at 60 ◦C for 10 min,and programmed to 250 ◦C at a rate of 3 ◦C/min, then isothermal at 250 ◦C for 5 min.