(a) GC-based calibration of gas-phase CC standard

Order	Ba	AA	PA	BA	IA	VA
Concentration (ppb)
1	40.0	199	40.2	37.2	39.2	30.2
2	80.0	398	80.4	74.4	78.4	60.4
3	160	797	161	149	157	121
The actual mass (ng) of CC injected into TD/GCb
1	12.8	35.9	9.5	11.0	13.8	10.6
2	25.6	71.8	19.1	21.9	27.6	21.3
3	51.1	144	38.2	43.9	55.2	42.6
Peak area
1	1,835,850	66,043	114,313	615,231	1,105,826	808,071
2	3,516,064	101,214	218,491	1,198,036	2,257,147	1,578,254
3	6,794,287	103,975	431,169	2,428,141	4,484,753	3,306,639

^aBecause of limitation in the analysis of FA, benzene (B) was analyzed in place of FA.

^bFlow rate = 100 mL min⁻¹, loading time = 1 min, and loading volume = 100 mL.