Table 2. Radiochemical yield of labelled particles following heating with 111In or 89Zr at 90 °C for 90 min. Labelling efficiency was assessed using TLC and independently with magnetic separation. Magnetic separation of 50 nm FluidMag was unsuccessful.
| Particle type | Nominal particle diameter | Matrix |
111In % RCY |
89Zr % RCY |
||
| TLC (SEM), n = 11 | Magnetic separation (SEM), n = 4 | TLC (SEM), n = 10 | Magnetic separation (SEM), n = 8 | |||
| FluidMag | 50 nm | Citrate | 68.5 (3.1) | — | 86.3 (1.8) | — |
| FluidMag | 100 nm | Citrate | 70.3 (3.8) | 81.1 (7.7) | 87.9 (2.2) | 83.4 (5.9) |
| FluidMag | 200 nm | Citrate | 69.1 (3.5) | 84.9 (6.7) | 93.3 (0.9) | 94.8 (0.5) |
| Biomag Maxi | 3–12 μm | Carboxyl functionalised alkoxysilane | 71.4 (3.1) | 86.1 (6.0) | 82.8 (1.6) | 93.3 (1.5) |
| SiMag | 500 nm | Silanol | 80.4 (3.1) | 83.7 (1.5) | 71.5 (2.8) | 64.3 (5.0) |