Table 2 Multiple and single time-point (at 30 min) estimation of the 225Ac and 213Bi activity for sample 3 and 4 containing 213Bi in SEq with 225Ac and an additional amount of 213Bi
CPM | 213Bi (SEq with 225Ac) | Added 213Bi | |||
|---|---|---|---|---|---|
kBq | %diff | kBq | %diff | ||
Sample 3 | |||||
Multiple time-points | \(CPM_{{{\text{EW}}_{{213_{{{\text{Bi}}}} }} }}\) | 93.7 | < 3 | 54.9 | < 3 |
Single time-point at 30 min | \(CPM_{{{\text{EW}}_{{213_{{{\text{Bi}}}} }} }}\), \(CPM_{{{\text{EW}}_{{221_{{{\text{Fr}}}} }} }}\) | 101.8 | 9 | 47.0 | − 15 |
Single time-point at 30 min (scatter corrected) | \(CPM_{{{\text{EW}}_{{213_{{{\text{Bi}}}} }} }}\), \(CPM_{{{\text{SC,EW}}_{{221_{{{\text{Fr}}}} }} }}\) | 93.4 | < 3 | 55.3 | < 3 |
Sample 4 | |||||
Multiple time-points | \(CPM_{{{\text{EW}}_{{213_{{{\text{Bi}}}} }} }}\) | 116.2 | < 3 | 32.9 | < 3 |
Single time-point at 30 min | \(CPM_{{{\text{EW}}_{{213_{{{\text{Bi}}}} }} }}\), \(CPM_{{{\text{EW}}_{{221_{{{\text{Fr}}}} }} }}\) | 122.9 | 6 | 28.4 | − 11 |
Single time-point at 30 min (scatter corrected) | \(CPM_{{{\text{EW}}_{{213_{{{\text{Bi}}}} }} }}\), \(CPM_{{{\text{SC,EW}}_{{221_{{{\text{Fr}}}} }} }}\) | 116.7 | < 3 | 32.8 | < 3 |