Table 5.
Adsorption of spores or virus particles on grids in relation to particle concentration of the sample suspension applied
| Concentration (part per ml) | Particles/22 squares | Interquartile range | Particles/square* | Interquartile range | No. Grids |
|---|---|---|---|---|---|
| Spores | |||||
| 108 | 244 | 22 | 11 | 1.0 | 3 |
| 107 | 28 | 8 | 1 | 0.4 | 3 |
| 106 | 11 | 2 | 0.5 | 0.1 | 3 |
| 105 | 1 | 0.4 | 0.05 | 0.02 | 3 |
| Virus | |||||
| 108 | 336 | 137 | 15 | 6 | 3 |
| 107 | 33 | 10 | 2 | 0.5 | 3 |
| 106 | 3 | 2 | 0.1 | 0.07 | 3 |
| 105 | 1 | 0.5 | 0.05 | 0.02 | 3 |
*Value for each grid was calculated from respective number counted for 22 grid squares.