Eichrom’s DGA Resins are extraction chromatographic materials in which the extractant system is either N,N,N’,N’-tetra-n-octyldiglycolamide (DGA Resin, Normal) or N,N,N’,N’-tetrakis-2-éthylhexyldiglycolamide (DGA Resin, Branched). The bed density of both DGA Resins is approximately 0.38 g/mL, with a working capacity of 7.23 mg 90Sr per mL of resin and 11 mg Yb per mL of resin.
Both forms of DGA Resin show more promise in analytical applications for americium than our other resins. They both have very high affinity for americium under certain conditions and americium is readily eluted under other conditions. Diphonix resin shows high affinity towards Am(III), however, its elution is not as easy as with DGA Resin. The TRU Resin also show a good affinity for Am(III) with a retention factor of 100 for 0.5 to 5 M HNO3. At those acid concentrations, however, the retention factor k’Am(III) on either form of DGA Resin is 30 to 500 higher than on TRU!