The investigation of dipicolinic acid diamide derivatives for the separation of actinides and lanthanides using solid phase extraction chromatography Public Deposited

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  • An alternative extractant for the TRUEX/UNEX process was investigated in solid phase extraction chromatography. The para and ortho isomers of diamides derivatives of dipicolinic acid (N,N'-diethyl-N,N'-ditolyl-dipicolinamide, EtTDPA) have been found in the past to effectively separate actinides from lanthanides in solvent extraction and were successfully impregnated on two uncoated, inert macroporous polymeric support resin types. The ortho resins consistently yielded higher extractions while the para resin consistently yielded higher Am/Eu separations. These findings were consistent with past solvent extraction experiments and suggest the versatility of these extractants in a variety of applications. The use of complexing agents were also considered both in the eluent and on the resin and found to change the extraction properties of the resin enough to warrant further investigation.
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