NUCL 77 |
| Trace level analysis of radioiodine is traditionally performed by TIMS which requires an initial chemical separation from interfering higher electron-affinity halogens. Experiments using 125I and 36Cl tracers have shown that iodide can be chemical oxidized and volatilized from solution while the chloride remains in the solution. A systematic investigation of the experimental factors that affect the transfer of iodine purged from solution along with the separation of iodine from chloride has been completed. Designed experiments were used to determine the optimum experimental conditions by obtaining a better understanding of factor affects and interactions. Factors such as gas purge rate, experiment run time, and oxidant concentration were simultaneously studied in a central composite design of experiments and response surfaces were generated from results. Optimizing experimental factors resulted in improved iodide oxidation and transfer efficiencies, halogen separation, and shorter analysis times. |
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Sci-Mix
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix
Division of Nuclear Chemistry & Technology |