Radiochemical Purity of 99mTc-ECD Stored at Room Temperature
| Analysis method | % RCP at time after reconstitution (mean ± SE) | Accuracy of method (%) | ||||
|---|---|---|---|---|---|---|
| 30 min | 120 min | 360 min | ||||
| Baker-Flex SG/EtAc | 98.3 ± 0.8 (n = 5) | — | — | 1.8 | ||
| W17/EtAc | 97.8 ± 0.3 (n = 19) | 98.8 ± 0.8 (n = 3) | 98.7 ± 0.3 (n = 3) | 1.3 | ||
| C18/saline, regular | 98.2 ± 0.2 (n = 19) | 98.0 ± 0.5 (n = 3) | 99.0 ± 0.4 (n = 3) | 1.0 | ||
| C18/saline, fast | 93.8 ± 0.4 (n = 19) | 93.8 ± 0.5 (n = 3) | 94.8 ± 0.4 (n = 3) | 1.8 | ||
| ITLC SG/saline | 97.4 ± 0.1 (n = 3) | 98.6 ± 0.0 (n = 3) | 97.0 ± 0.3 (n = 3) | 0.2 | ||
| SAX/WFI | 96.0 ± 1.2 (n = 3) | — | — | 2.1 | ||
SG = silica gel; EtAc = ethylacetate; W17 = Whatman 17; SAX = strong anion exchange.