TABLE 1.
Elemental X-Ray Fluorescecnce Characterization of Teflon Filters From Ambient Air and Exposure Chambers
| Element | Ambient air (ng/m3) | FA (ng/m3) | CAPs (ng/m3) | Fold change from FA |
|---|---|---|---|---|
| Na | 37.2 [± 23.5] | 6.0 [± 10.2] | 345.0 [± 125.8] | 57.5 |
| Mg | 10.5 [± 5.0] | 5.1 [± 2.8] | 117.3 [± 39.0] | 23.4 |
| S | 594.5 [± 153.1] | 6.6 [± 1.6] | 4456.3 [± 1039.9] | 675.0 |
| K | 43.8 [± 6.6] | 2.5 [± 0.7] | 312.8 [± 70.3] | 125.2 |
| Ca | 27.3 [± 5.9] | 7.6 [± 2.7] | 190.3 [± 62.7] | 25.0 |
| Mn | 4.3 [± 0.1] | 0.5 [± 0.1] | 50.9 [± 33.9] | 101.8 |
| Fe | 61.5 [± 28.9] | 3.8 [± 1.0] | 1430.1 [± 928.1] | 376.3 |
| Ni | 1.6 [± 0.2] | 0.4 [± 0] | 123.2 [± 86.1] | 307.5 |
| Cu | 1.4 [± 0.8] | 0 [± 0.1] | 40.8 [± 27.8] | 40.8 |
| Zn | 19.9 [± 13.1] | 1.1 [± 1.2] | 34.6 [± 11.0] | 31.5 |
| Sr | 0.1 [± 0.6] | 0.1 [± 0.1] | 5.9 [± 3.4] | 59.0 |
Values in Ambient, FA, and CAPs colums reperesent mean ± SEM (N = 7 filters/atmosphere).