Table 5.
Effect of filter conditioning and storage, showing average percentage change and standard deviation (in parentheses).
| Filter conditioning |
Filter storage |
|||||
|---|---|---|---|---|---|---|
| Changea (conditioned vs. unconditioned) (%) | Change (Day7-1 vs. Day0) |
Change (Day30 vs. Day7-2) |
||||
| Group | Compound | Unspiked (%) | Spiked (%) | Unspiked (%) | Spiked (%) | |
| Naphthalene | − 27 (3) | n/a | − 4 (8) | − 11 (12) | 0 (3) | |
| Acenaphthylene | − 39 (22) | 0 (31) | 0 (86) | − 4 (5) | − 6 (46) | |
| Acenaphthene | − 3 (5) | − 6 (23) | 123 (257) | − 1 (31) | 0 (3) | |
| Phenanthrene | − 35 (36) | n/a | 12 (48) | 0 (1) | − 4 (6) | |
| Anthracene | n/a | n/a | 2 (82) | n/a | − 3 (0) | |
| Fluoranthene | n/a | n/a | 0 (21) | n/a | − 2 (12) | |
| Pyrene | − 29 (15) | − 2 (21) | − 10 (16) | − 7 (6) | − 9 (3) | |
| PAHs | Benzo[a]anthracene | n/a | n/a | n/a | n/a | − 2 (7) |
| Chrysene | n/a | n/a | n/a | n/a | − 2 (10) | |
| Benzo[b]fluoranthene | n/a | 17 (44) | 57 (13) | n/a | − 3 (8) | |
| Benzo[k]fluoranthene | n/a | n/a | n/a | n/a | 7 (24) | |
| Benzo[a]pyrene | n/a | − 1 (32) | 12 (43) | n/a | 2 (6) | |
| Indeno[1,2,3-c,d]pyrene | n/a | n/a | 26 (16) | n/a | − 5 (21) | |
| Dibenzo[a,h]anthracene | n/a | n/a | n/a | n/a | − 4 (6) | |
| Average | − 27 (20) | 2 (32) | 11 (46)b | − 4 (15) | − 2 (16) | |
| 1-Nitronaphthalene | n/a | − 8 (8) | − 30 (9) | − 11 (19) | − 25 (8) | |
| 2-Nitronaphthalene | − 14 (4) | 34 (8) | − 9 (37) | − 5 (40) | − 2 (29) | |
| 2-Nitrobiphenyl | − 10 (61) | 1 (9) | 8 (8) | − 15 (7) | − 1 (2) | |
| NPAHs | 3-Nitrobiphenyl | − 9 (45) | − 32 (15) | − 23 (4) | − 9 (8) | − 2 (7) |
| 4-Nitrobiphenyl | − 13 (31) | − 29 (8) | 10 (49) | n/a | − 4 (4) | |
| 6-Nitrochrysene | 2 (21) | − 21 (11) | − 14 (46) | 3 (18) | 0 (2) | |
| Average | − 8 (38) | − 9 (10) | − 10 (32) | − 7 (20) | − 6 (13) | |
| 17α(h),21β(h)-Hopane | 7 (27) | − 2(14) | − 13 (16) | |||
| Hopanesc | 17α(h)-22,29,30-Trisnorhopane | 39 (40) | − 2 (21) | 25 (27) | ||
| Average | 23 (34) | − 2 (18) | 6 (22) | |||
| 20s- 5α(h),14α(h),17α(h)-Cholestane | 2 (14) | − 8 (11) | 5 (11) | |||
| Steranesc | 20r- 5α(h),14β(h),17β(h)-Cholestane | 13 (26) | − 9 (13) | 1 (18) | ||
| Average | 8 (21) | − 8 (12) | 3 (15) | |||
a
Results for PAHs and NPAHs include only unspiked filters to avoid possible errors due to spiking (see text).
b
Excluded ACT.
c
Results for hopanes and steranes combine both spiked and unspiked filters since the spiking solution did not contain these compounds.
n/a: Compound was not detected.