Table 3.
Certified and statistically analysed mean diameters (expressed as a percentage of the certified value) of four different microspheres as determined by electro-impedance volumetric zone sensing (ES), optical microscopy (OM) and laser diffraction (LD)
| Microsphere | Certified mean diameter in μm (Uncertainty in %) | Measured mean diameter in % of certified value |
||
|---|---|---|---|---|
| ES | OM | LD | ||
| L2 | 2 ± 0.134 (6.7) | 113 ± 15 | 114 ± 7 | 101 ± 13 |
| L3 | 3 ± 0.134 (4.5) | 100 ± 17 | 97 ± 10 | 103 ± 7 |
| L5 | 5 ± 0.183 (3.7) | 108 ± 22 | 102 ± 11 | 82 ± 11 |
| L10 | 10 ± 0.360 (3.6) | 111 ± 25 | 95 ± 28 | 91 ± 11 |