TABLE 2.
Experimental data obtained on the sample, using different setups. The confidence limits (LFL-UFL and ΔC) were calculated only for the respirable fibres count, following the methodologies reported in the text.
| Lab 1_Au layer | Lab 2_C layer | Lab 2_Au layer | ||
|---|---|---|---|---|
| Respirable WHO fibres | Number of fibres evaluated (L > 5 µm) | 228 | 126 | 142 |
| Concentration [f/L] | 4.44·107 | 2.85·107 | 3.21·107 | |
| LFL | 4.13·107 | 2.49·107 | 2.66·107 | |
| UFL | 4.76·107 | 3.54·107 | 3.74·107 | |
| Concentration [µg/L] | 39.49 | 103.43 | 66.60 | |
| ΔC [µg/L] | 18.48 | 25.93 | 15.62 | |
| Average mass of a fibre [µg] | 8.91 10−7 | 3.63 10−6 | 2.08 10−6 | |
| All fibres | Total number of fibres (all lengths) | 241 | 184 | 183 |
| Concentration [f/L] | 4.97·107 | 4.16·107 | 4.14·107 | |
| Concentration [µg/L] | 39.63 | 107.22 | 77.60 | |
| Average mass of a fibre [µg] | 8.45 10−7 | 2.58 10−6 | 1.87 10−6 | |
| % respirable fibres | 94.6% | 68.5% | 77.6% | |
| % fibres W < 0.2 µm | 95% | 59% | 50% | |
| Number of bundles (W > 0.5 µm) | 3 | 4 | 4 | |
| Mean fibre aspect ratio | 168.4 | 70.2 | 74.5 |