PTV was used for the 2 lL injection volume into a silcosteel liner (120 2 mm id). The temperature
programming of the PTV was 85 C for 0.3 min; 600 C/min to 270 C and hold for 2 min; 840 C/min to 300 C for 5 min. The carrier gas, helium, operates at 100 kPa in constant pressure mode.