Table 3. Size-Fractionated Fine and Ultrafine Particle-Bound SVOCs: Geometric Means (95% CIa).
| geometric
mean (95% CI)b |
||||
|---|---|---|---|---|
| compound | TPc | SMc | geo. mean ratio (TP/SM) | p-value |
| fine particle-bound SVOCs | ||||
| nicotine (μg/session) | 2099 (1910, 2306) | 2246 (2064, 2444) | 0.93 | 0.0021* |
| cotinine (ng/session) | 17 017 (15 793, 18 337) | 17 627 (16 444, 18 896) | 0.97 | 0.0545 |
| pyrene (ng/session) | 346 (325, 369) | 363 (342, 385) | 0.95 | 0.0065* |
| benzo[a]pyrene (ng/session) | 75.4 (69.4, 81.9) | 78.1 (71.8, 85.8) | 0.97 | 0.1032 |
| quinoline (ng/session) | 204 (178, 234) | 217 (191, 247) | 0.94 | 0.0219* |
| NAT (ng/session)d | 781 (709, 859) | 793 (720, 872) | 0.98 | 0.3517 |
| NNN (ng/session)d | 372 (339, 408) | 376 (344, 411) | 0.99 | 0.5857 |
| NAB (ng/session)d | 444 (405, 486) | 445 (405, 488) | 1.00 | 0.9244 |
| NNK (ng/session)d | 402 (365, 444) | 402 (365, 443) | 1.00 | 0.9975 |
| ultrafine particle-bound SVOCse | ||||
| nicotine (μg/session) | 1157 (1122, 1192) | 1167 (1131, 1204) | 0.99 | 0.5383 |
| cotinine (ng/session) | 1172 (982, 1398) | 1217 (1030, 1438) | 0.96 | 0.1272 |
| pyrene (ng/session) | 23.6 (21.4, 26.1) | 24.7 (22.1, 27.5) | 0.96 | 0.0704 |
| benzo[a]pyrene (ng/session) | 4.20 (3.49, 5.06) | 4.36 (3.57, 5.33) | 0.96 | 0.1115 |
| quinoline (ng/session) | 129 (117, 141) | 136 (124, 149) | 0.95 | 0.0034* |
| NAT (ng/session)d | 82.8 (70.8, 96.8) | 84.2 (71.6, 99.0) | 0.98 | 0.3932 |
| NNN (ng/session)d | 29.5 (24.3, 35.7) | 30.2 (25.2, 36.3) | 0.98 | 0.2918 |
| NAB (ng/session)d | 62.0 (52.4, 73.3) | 61.1 (51.2, 72.9) | 1.01 | 0.5104 |
| NNK (ng/session)d | 38.4 (32.0, 46.1) | 38.04 (31.8, 45.5) | 1.01 | 0.7305 |
a
95% CI = 95% confidence interval.
b
Sample sizes: Fine Particle-Bound SVOCs = 144, using all profiles; Ultrafine Particle-Bound SVOCs = 48, using all profiles.
c
TP = true profile; SM = smoothed profile.
d
NAT = N-Nitrosoanatabine; NNN = N-Nitrosonornicotine; NAB = N-Nitrosoanabasine; NNK = 4-(N-Nitrosomethylamino)-1-(3-pyridyl)-1-butanone.
e
Summed over three replicate samples.
*
Significant at p < 0.05 level.