Table 3.
Pearson correlation coefficient among measurement devices
| LAB (n = 1,631) |
ENP (n = 1,539) |
UNP (n = 3,027) |
Total (n = 6,377) |
|||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SMPS Total | ≤ 100 nm | > 100 nm | CPC | SAM | SMPS Total | ≤ 100 nm | > 100 nm | CPC | SAM | SMPS Total | ≤ 100 nm | > 100 nm | CPC | SAM | SMPS Total | ≤ 100 nm | > 100 nm | CPC | SAM | |
| SMPS Total | 1 | 1 | 1 | 1 | ||||||||||||||||
| ≤100 nm | 0.963 | 1 | 0.992 | 1 | 0.962 | 1 | 0.970 | 1 | ||||||||||||
| >100 nm | 0.830 | 0.650 | 1 | 0.829 | 0.753 | 1 | 0.671 | 0.445 | 1 | 0.742 | 0.558 | 1 | ||||||||
| CPC | 0.869 | 0.823 | 0.750 | 1 | 0.925 | 0.905 | 0.823 | 1 | 0.457 | 0.427 | 0.349 | 1 | 0.623 | 0.585 | 0.517 | 1 | ||||
| SAM | 0.883 | 0.766 | 0.908 | 0.889 | 1 | 0.857 | 0.825 | 0.824 | 0.834 | 1 | 0.648 | 0.525 | 0.705 | 0.538 | 1 | 0.745 | 0.644 | 0.770 | 0.694 | 1 |
All results of Pearson correlation coefficient were p < 0.001.
CPC, condensation particle counter; ENP, engineered nanoparticle manufacturing workplace; LAB, laboratory; LEV, local exhaust ventilation; SAM, surface area monitor; SMPS, scanning mobility particle sizer; UNP, unintended nanoparticle emitted workplace.