Fig. 1
Different geometries of plating, A (left) disc immersed in the solution and B (right) disc mounted to the bottom of the vessel.
Fig. 2
Distribution of 210Po between silicates and non-silica matrix in different samples.
Fig. 3
Results of the 210Po determination on different electrodes, the red line represents the certified value for IAEA-447 (dashed line represents the expanded uncertainty for k = 2 of the certified value).
Table 1
Validation parameters of samples from plating optimization experiment, calculations performed for expanded uncertainty (k = 2)
| Electrode | 210Po (Bq·kg−1) | Z-score | U-score |
|---|---|---|---|
| Fe | 240 ± 140 | −2.11 | −0.90 |
| Ag | 306 ± 24 | 0.07 | 0.11 |
| Cu (geom. A) | 291 ± 31 | −0.61 | −0.61 |
| Cu (geom. B) | 301 ± 35 | −0.10 | −0.13 |
Fig. 4
Scheme of the analytical procedure for polonium determination in soil.