An Exploration on the Suitability of Airborne Carbonyl Compounds Analysis in relation to Differences in Instrumentation (GC-MS versus HPLC-UV) and Standard Phases (Gas versus Liquid)

Table 3

Comparison of TD/GC/MS-based calibration analysis of CC using both standard phases.

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

Order	B^a	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/GC^b
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.

(b) GC-based calibration of liquid-phase CC standard

Order	B	AA	PA	BA	IA	VA
Concentration (ng 𝜇L^−1) of CC injected into GC^c
1	10.1	27.2	9.03	9.30	9.02	9.17
2	20.2	54.4	18.1	18.6	18.0	18.3
3	40.4	109	36.1	37.2	36.1	36.7
Peak area
1	1,502,193	76,511	36,105	425,976	641,460	612,205
2	2,784,977	172,068	113,520	954,543	1,503,596	1,489,447
3	5,361,966	351,382	234,837	1,957,700	2,992,220	3,077,189

cGC injection volume: 1 𝜇L.