<Superscript>64</Superscript>Cu, <Superscript>66</Superscript>Cu and <Superscript>99m</Superscript>Tc for studies related to copper-associated hepatitis in dobermann dogs

Summary

An extractive scintillating (ES) resin was evaluated for its performance as an on-line monitor of uranium in water. The TRU-ES resin is comprized of an inert macroporous polystyrene core impregnated with the organic fluors [diphenyloxazole (PPO) and 1,4-bis-(4-methyl-5-phenyl-2-oxazolyl)benzene (DM-POPOP)) and the selective extract (octyl(phenyl)-N, N-diisobutyl-carbamoylmethylphosphine oxide (CMPO) in tri-butyl phosphate (TBP)]. The TRU-ES resin, packed into translucent FEP Teflon tubing, was placed into a flow-cell scintillation detection system. Acidified aqueous solutions, <Superscript>233</Superscript>U spiked synthetic ground water and EPA natural uranium QA samples, were pumped through the flow-cell while gross count rate and pulse-height spectra were collected. The increase in count rate is attributed to the uranium being extracted from the aqueous medium and retained by the TRU-ES resin with simultaneous detection of the resultant scintillation photons. The TRU-ES loading efficiency was nearly quantitative out of 2M HNO<Subscript>3</Subscript> with a flow rate of 0.5 ml<Superscript> .</Superscript> min<Superscript>-1</Superscript>. The detection efficiency was measured to be 51&percnt; for <Superscript>233</Superscript>U. The detection limit was determined to be ~2 Bq<Superscript> .</Superscript> l<Superscript>-1</Superscript> for <Superscript>233</Superscript>U based on a resin free column volume of 0.2 ml, and 50 ml of 2M HNO<Subscript>3</Subscript> acidified groundwater.