Precision (CV) of personal, indoor, and outdoor x ray fluorescence analysis by element in Amsterdam and Helsinki (median values >25% are in bold)
| Amsterdam | Helsinki | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Indoor (n = 10) | Outdoor (n = 10) | Personal (n = 5) | Indoor (n = 10) | Outdoor (n = 7) | Personal (n = 7) | |||||||
| n | Median | n | Median | n | Median | n | Median | n | Median | n | Median | |
| PM2.5 | 10 | 3.6 | 10 | 1.7 | 5 | 13.0 | 10 | 6.4 | 7 | 7.8 | 7 | 7.0 |
| Abs | 10 | 4.5 | 10 | 3.3 | 5 | 10.7 | 10 | 3.3 | 7 | 4.7 | 7 | 5.7 |
| S | 10 | 2.5 | 10 | 2.9 | 5 | 4.5 | 10 | 3.1 | 7 | 2.5 | 7 | 1.3 |
| Zn | 10 | 3.2 | 10 | 3.0 | 5 | 18.4 | 10 | 6.4 | 7 | 9.7 | 7 | 3.1 |
| Fe | 10 | 4.7 | 10 | 9.5 | 5 | 16.4 | 10 | 11.6 | 7 | 35.4 | 7 | 2.6 |
| Ni | 10 | 4.3 | 10 | 33.6 | 5 | 70.8 | 10 | 19.7 | 7 | 3.9 | 3 | 35.7 |
| Mn | 10 | 7.5 | 9 | 10.7 | 5 | 39.0 | 8 | 22.1 | 6 | 41.2 | 6 | 141.4 |
| V | 5 | 24.4 | 9 | 13.2 | 0 | 8 | 17.4 | 3 | 15.1 | 1 | 32.5 | |
| K | 10 | 3.2 | 10 | 5.0 | 5 | 4.1 | 10 | 3.7 | 7 | 30.0 | 7 | 11.6 |
| Ca | 10 | 4.9 | 10 | 10.0 | 5 | 2.7 | 10 | 7.5 | 7 | 46.2 | 7 | 2.9 |
| Cu | 10 | 4.0 | 10 | 43.8 | 5 | 34.0 | 10 | 10.3 | 7 | 64.3 | 7 | 6.1 |
| Si | 8 | 11.7 | 3 | 12.1 | 4 | 22.3 | 10 | 13.6 | 7 | 56.4 | 6 | 23.9 |
| Cl | 8 | 9.3 | 8 | 23.0 | 3 | 14.5 | 8 | 5.1 | 1 | 51.4 | 5 | 6.9 |
| Pb | 9 | 40.5 | 10 | 50.1 | 4 | 20.3 | 10 | 14.2 | 7 | 84.6 | 6 | 95.2 |
| Al | 4 | 89.7 | 2 | 26.0 | 1 | 141.4 | 3 | 141.4 | 6 | 30.4 | 1 | 141.4 |