2. Medium-polar column-BP10: 30 m · 0.25 mm · 0.25 lm; oven program was initial temperature: 50 C for 0.5 min,
rate of temperature increase: 10 C/min up to 245 C, final hold: 245 C for 5 min; injector temperature was maintained
at 240 C (splitless); and detector temperature was 260 C.