A screening experiment was carried out where the organic phase consisted of different concentrations of 2,6-bis-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo[1,2,4]triazy-3-yl)-[2,2']bipyridinyl (CyMe4-BTBP) , which is the extracting molecule, dissolved in different diluents. The aqueous phase consisted of 0.01 M HNO3 and was spiked with trace amounts of 241Am and 152Eu acting as analogues for actinides and lanthanides. The ionic strength was kept constant at 1.0 M using NaNO3. Three of the selected diluents used to dissolve CyMe4-BTBP were abandoned: n-hexane, TPH and TBB. Another extraction experiment screened out anisole, 1,1,2,2-tetrachloroethane and benzaldehyde.
A kinetic experiment was then performed. Three very different kinetic behaviors were observed in three different organic systems. For a proper understanding of the kinetic mechanism, further investigations are needed.