Optimization and Validation of Thermal Desorption Gas Chromatography-Mass Spectrometry for the Determination of Polycyclic Aromatic Hydrocarbons in Ambient Air
Table 4
TD-GC/MS method validation parameters for the 16 EPA PAHs in NIST SRM 1649b urban dust ().
PAH
Experimental mean (ng)a
NIST-certified value (ng)a
RSD (%)
Recovery (%)
Accuracyb (%)
Naph
3694 ± 1082
26.8 ± 3.0
46.3
13809
13709
Acy
6.97 ± 0.61
1.99 ± 0.24
13.9
351
251
Ace
1.57 ± 0.19
2.03 ± 0.41
19.5
77.3
−22.8
FL
2.06 ± 0.21
2.29 ± 0.67
16.4
89.9
−10.1
Phe
42.7 ± 3.3
45.3 ± 0.2
12.0
94.3
−5.70
Ant
12.6 ± 0.8
10.1 ± 0.2
9.82
125
25.1
Ft
59.6 ± 3.2
67.9 ± 0.4
8.56
87.7
−12.3
Pyr
51.8 ± 2.8
51.2 ± 1.4
8.56
101
1.01
BaA
19.3 ± 1.1
21.7 ± 0.5
8.70
88.7
−11.3
Chry
26.2 ± 1.3
31.3 ± 0.3
7.95
83.5
−16.5
BbFt + BjFt
75.0 ± 6.2
81.3 ± 2.3
13.0
92.2
−7.79
BkFt
16.1 ± 1.4
17.5 ± 0.5
13.4
91.9
−8.15
BaP
20.4 ± 1.5
25.4 ± 1.2
11.5
80.2
−19.8
IP
35.5 ± 1.9
29.7 ± 1.7
8.63
119
19.3
DBahA + DBacA
6.35 ± 0.93
6.02 ± 0.11
23.1
105
5.42
BghiP
37.2 ± 2.2
40.8 ± 0.4
9.31
91.1
−8.90
Averagec
—
—
12.2
96.7
|12.4|
aExpanded uncertainty about the mean, with coverage factor, k = 2; baccuracy = (experimental value − certified value) × 100/certified value; cexcept Naph and Acy.
