The oven temperature was programmed from holding
at 110 1C for 6 min to 165 1C at a rate of 11 1C/min and
held for 13 min, to 195 1C at a rate of 15 1C/min and held for
22 min, and then to 230 1C at a rate of 7 1C/min and held for
7 min. The carrier gas was helium, the injection volume was
set at 3 μL and the split ratio was 1:50.