Optimization and Validation of Thermal Desorption Gas Chromatography-Mass Spectrometry for the Determination of Polycyclic Aromatic Hydrocarbons in Ambient Air

Table 5

Soxhlet extraction-GC/MS method validation parameters for the 16 EPA PAHs in SRM 1649b ().

PAH	Experimental mean (ng)^a	NIST-certified value (ng)^a	RSD (%)	Recovery (%)	Accuracy^b (%)
Naph	67.3 ± 18.6	391 ± 35	33.8	17.2	−82.8
Acy	20.2 ± 5.9	79.9 ± 9.5	35.9	25.2	−74.8
Ace	25.0 ± 5.4	81.6 ± 16.5	26.5	30.7	−69.4
FL	32.6 ± 9.2	92.3 ± 14.4	34.5	35.3	−64.7
Phe	1215 ± 331	1668 ± 24	33.4	72.8	−27.2
Ant	104 ± 25	169 ± 1	32.5	61.8	−38.2
Ft	2392 ± 559	2573 ± 32	31.0	93.0	−7.05
Pyr	1914 ± 398	2054 ± 57	27.6	93.2	−6.79
BaA	808 ± 148	870 ± 20	24.3	92.9	−7.13
Chry	1632 ± 464	1256 ± 11	37.6	129	29.9
BbFt + BjFt	3144 ± 800	3260 ± 91	33.7	96.4	−3.58
BkFt	921 ± 319	702 ± 20	45.9	131	31.3
BaP	1019 ± 271	1018 ± 98	35.2	100	0.07
IP	1109 ± 296	1192 ± 65	35.4	93.1	−6.89
DBahA + DBacA	507 ± 176	241 ± 4	45.9	363	263
BghiP	2143 ± 580	1777 ± 32	35.8	120	20.6
Average^c	—	—	34.9	120	|36.8|

^aExpanded uncertainty about the mean, with coverage factor, k = 2; ^baccuracy = (experimental value − certified value) × 100/certified value; ^cexcept Naph, Acy, Ace, and FL.