Table 5.
Nanoparticle concentrations measured by Grimm and TSI research-grade scanning mobility particle sizers (RG-SMPSs) at ENP-E (unit: dN/dlogDp [particles/cm3])
| SMPS Total | Grimm RG-SMPS |
SMPS Total | TSI RG-SMPS |
||||
|---|---|---|---|---|---|---|---|
| ≤ 100 nm | > 100 nm | ≤ 100 nm | > 100 nm | ||||
| ENP-E (n = 232) | Mean | 122,429* | 91,389* | 31,040* | 147,031 | 104,317 | 42,713 |
| SD | 2,359 | 1,834 | 631 | 2,637 | 1,898 | 1,018 | |
| Median | 125,462 | 96,036 | 28,418 | 145,627 | 107,767 | 39,617 | |
| Percentile (5th–95th) | 62,134–173,921 | 42,422–131,046 | 18,625–46,620 | 87,221–204,526 | 59,393–145,322 | 25,758–61,954 | |
* p < 0.01.
ENP, engineered nanoparticle manufacturing workplace.