抄録
Elutions of 99mTc and 113mIn have been performed subsequently with 10 mL of 0.9% NaCl solution and 10 mL of 0.1 M HCl solution, respectively, from 6-tungstocerate(IV) chromatographic column loaded with 0.54 MBq 99Mo and 0.45 MBq 113Sn, using alumina-column filter in the case of 99mTc. Radionuclidic purity of both eluates was ≥ 99.99%. Elution yields of 72.5±5.8% and 62.2±3.7%, and radiochemical purities of 96.9±1.0% (as 99mTcO4-) and 88.4±2.5% (as 113mIn3+) have been obtained for 99mTc and 113mIn, respectively. Al and W impurities in the 99mTc and 113mIn eluates, respectively, were found to be within the accepted limits, whereas no Ce impurities were detected in both eluates. Also trials have been carried out on a similar system to obtain mixed 99mTc-113mIn eluates from 6-tungstocerate column with different 99mTc/113mIn ratios using 0.9% NaCl-HCl eluents of different pH values. To separate 99mTc and 113mIn from each other, these mixed eluates were passed through a column of hydrous zirconium oxide which was then eluted with 10 mL of 0.9% NaCl solution and 15 mL of 0.1 M HCl solution, respectively. No W, Ce, or Zr impurities were detected in the 99mTc and 113mIn eluates obtained in these trials.
