RESOLUTION OF URANIUM ISOTOPES WITH KINETIC PHOSPHORESCENCE ANALYSIS

Journal Article · Mon Apr 01 04:00:00 EDT 2013 · Journal of Radioanalytical and Nuclear Chemistry, 296(2):923-925

DOI:https://doi.org/10.1007/s10967-012-2264-2· OSTI ID:1126346

Miley, Sarah M.; Hylden, Anne T.; Friese, Judah I.

This study was conducted to test the ability of the Chemchek™ Kinetic Phosphorescence Analyzer Model KPA-11 with an auto-sampler to resolve the difference in phosphorescent decay rates of several different uranium isotopes, and therefore identify the uranium isotope ratios present in a sample. Kinetic phosphorescence analysis (KPA) is a technique that provides rapid, accurate, and precise determination of uranium concentration in aqueous solutions. Utilizing a pulsed-laser source to excite an aqueous solution of uranium, this technique measures the phosphorescent emission intensity over time to determine the phosphorescence decay profile. The phosphorescence intensity at the onset of decay is proportional to the uranium concentration in the sample. Calibration with uranium standards results in the accurate determination of actual concentration of the sample. Different isotopes of uranium, however, have unique properties which should result in different phosphorescence decay rates seen via KPA. Results show that a KPA is capable of resolving uranium isotopes.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1126346
• Report Number(s): PNNL-SA-90609; 400470000
• Journal Information: Journal of Radioanalytical and Nuclear Chemistry, 296(2):923-925, Journal Name: Journal of Radioanalytical and Nuclear Chemistry, 296(2):923-925
• Country of Publication: United States
• Language: English