Table 2. GC × GC Settings for FID Analysis^a.

detector	FID			TOF-MS, 25–500 amu
origin of the bio-oil	pine wood	wheat straw	rapeseed cake	pine wood	wheat straw	rapeseed cake
column combination	1	1	2	1	2	2
injector, temperature [°C]	PTV, 350	PTV, 350	PTV, 300	Split/Splitless, 300	Split/Splitless, 300	Split/Splitless, 300
split flow [mL min–1]	30	10	50	150	10	12
carrier gas [mL min–1]	2.1	2.1	2.1	3.5	2.9	2.9
oven temperature program [°C]	–25→350	–25→350	–40 →300	–40→300	–25→350	–40→300
heating rate [°C min–1]	3 °C min–1
modulation period [s]	7
detector acquisition rate [Hz]	100	100	100	30	30	30

^aColumn combination 1 = MXT-1/BPX-50, column combination 2 = RTX-1 PONA/BPX-50.