DGA Resin Product Brochure

PRODUCT SHEET TRISKEM INTERNATIONAL Parc de Lormandière Bât. C – Rue Maryse Bastié – Campus de Ker Lann – 35170 Bruz – France Tel +33 (0)2.99.05.00.09 – Fax +33 (0)2.99.05.07.27 – www.triskem-international.com – email : contact@triskem.fr SAS au capital de 40.000 euros – SIRET 493 848 972 00011 – APE2059Z – TVA intra communautaire FR65 493 848 972 19/12/12 DGA Resin (Normal and Branched) Main Applications - Separation of Americium - Separation of Actinium Packing Order N°. Form Particle size DB-B10-S 10g bottle DGA, branched (DB) 50-100 µm DB-R50-S 50 2ml cartridges DGA, branched (DB) 50-100 µm DN-B25-A, DN-B50-A, DN-B100-A, DN-B200-A 25g, 50g, 100g, 200g bottle DGA, normal (DN) 100-150 µm DN-B10-S, DN-B25-S, DN-B50-S, DN-B100-S, DN-B200-S 10g, 25g, 50g, 100g, 200g bottle DGA, normal (DN) 50-100 µm DN-R10-S 10 2ml cartridges DGA, normal (DN) 50-100 µm Physical and chemical properties Density : 0,38g/ml Capacity : 12 mg Eu/ml resin DN (DGA, normal) 15 mg Eu/ml resin DB (DGA, branched) Conversion factor DW/k' : 1,75 Conditions of utilization Recommended T of utilization : / Flow rate: Utilization with vacuum or with pressure for s grade resin Storage: Dry and dark, T<30°C For additional information see enclosed literature study Methods* Reference Description Matrix Analytes Support ACW16 VBS Am_Np_Pu_Th_Cm_U in water (VBS) water Am, Np, Pu, Th, Cm, U cartridges ACW17-VBS Am_Np_Pu_Th_Cm_U_Sr in water (VBS) water Am, Np, Pu, Th, Cm, U, Sr cartridges RAW04 Radium-226/228 in water (MnO2 & DGA Resin method) water Ra-226, Ra-228 cartridges *developped by Eichrom Technologies Inc. LITERATURE STUDY 2 DGA Resin DGA resin, unlike the other resins used for the separation of actinides, shows a great affinity for americium, in both nitric and hydrochloric acid media. Besides its affinity for americium, DGA resin may also be used for the separation of radium/actinium and calcium/strontium/yttrium. The results presented here were obtained with DGA resin with particle size of 50-100 µm. Figure 1 : DGA resin extractant, R = 8 Assumed extraction equilibrium: With M = Ln, Ac and E = DGA (extractant) in stationary phase and X = Cl- or NO3- Two forms of DGA resin exist, the non-branched or Normal (DGA resin, Normal orN,N,N’,N’-tetra-n-octyldiglycolamide) and the Branched (DGA resin, Branched or N,N,N’,N’-tetrakis-2-ethylhexyl-diglycolamide). Both forms of DGA resin show more promising results 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 (figure 2). Diphonix resin shows high affinity for 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 acidities, the retention factor k’Am(III) on DGA resin is 30 to 500 higher than on TRU. The properties of the DGA Resins allow for the selective separation of Am(III) with fear of breakthrough due to weak retention. Am(III) is strongly fixed to either DGA Resin in 5 M HNO3 or HCl and can be eluted with 0.01 M HNO3 or 0.5 M HCl (figure 2). Figure 2: Am(III) retention profiles with different resins with variable concentrations of HNO3 and HCl. Retention profiles for U, Pu and Th are presented in figures 3. The diagrams show that higher Pu/Am separation factors are obtained for the normal version of DGA Resin. Pu(IV) shows strong affinity for the resin with a retention factor k’> 3000 over the entire acid range studied. U and Th affinities towards the DGA Resins depend upon the acid, its concentration and the type of DGA Resin.Given these data, the combination of TEVA and DGA Resin (Normal) would allow one to first separate tetravalent elements on TEVA, leaving U and Am which would be retained on DGA resin. U would be first eluted with 0.5 M HNO3 followed by Am(III) with 0.5 M HCl. Figure 3a : Pu, Th, U et Am retention profiles with respect to HNO3 and HCl concentrations on DGA, normal 424333)(24)(33XDGAMDGAXMXDGAMDGAXM?????????? LITERATURE STUDY 3 Figure 3b : Pu, Th, U et Am retention profiles with respect to HNO3 and HCl concentrations on DGA, normal and DGA, branched resins DGA resin can also be used for the separation of radium-actinium and yttrium-strontium. Ra/Ac separation For the determination of Ra-226 and Ra-228, Ba-133 is used as a tracer to evaluate Ra chemical yield. Ba-133 quantification is done by gamma spectrometry. Ra-226 is quantified by alpha spectrometry after micro-precipitation with BaSO4. Ra-228 is determined via its daughter Ac-228 either by gamma spectrometry or by gas flow proportional counting after micro-precipitation with CeF3. Figure 4 shows k’ values of Ra and Ce with respect to varying acid concentrations. Figure 4 : Ra and Ce elution profiles with respect to acidic media and concentrations. Ce is a chemical analogue of Ac and it can reasonably be assumed that Ac behaviour on this resin will be similar to Ce behaviour. In HNO3 media, Ra shows no real affinity for the resin (1< k’Ra<7). However, Ce has k’>1000 for concentrations higher than 1M. So Ac should be easily retained on the resin for concentrations in HNO3 of 1–3M while Ra elutes. In HCl media, the separation is efficient at 8M (selectivity a(Ce/Ra) > 105.) Cerium (and actinium) is easily stripped with low concentrations of HCl (e.g., <0.5M HCl). Y/Sr Separation Experiments were also performed to determine the behaviour of Y, Sr and Ca on DGA Resin. The results obtained are presented in Figure 5. Contrary to Sr resin, DGA resin shows very strong affinity for Y (k’ > 105 at 3M HNO3) and lower affinity for Sr, Ca and Ba. This allows first the elution of Sr, Ca and Ba then the selective stripping of Y. Sr and Ca present similar elution profiles. Coupling Sr Resin and DGA resins allows the purification of Y-90 to a great extent. Figure 5 : Sr, Y, Ca and Ba elution profiles on DGA Resin, Normal with respect to acidic media and concentration Interfering Elements The study of the interfering elements like Bi, Pb, Fe and Cu gave the results shown Figure 6. DGA Resin can be used for Bi separation. The resin shows no affinity for iron and copper both at low HCl concentrations, and over a wide range of HNO3 concentrations. In addition, it is also important to note that k’ value for Al(III) and Ti(IV) is less than 2 for all concentrations of either HNO3 or HCl. Horwitz et al. (3) cold show that high concentrations of Fe(III) and other cations can lead to a sharp increase of the Am k’ values in hydrochloric media (Fig. 7), an effect that was used in order to rapidly preconcentrate Am and Pu from leached soil samples. The robustness of DGA against interferences from cations generally found in environmental samples makes its application e.g. in the analysis of Am in large soil samples very interesting (4, 5). LITERATURE STUDY 4 Figure 6 : Bi, Pb, Fe and Cu elution curves with respect to acidic media and concentrations. Figure 7 : k’ values for varying metal and HCl concentrations on normal DGA Pourmand and Dauphas determined distribution coefficients kd of 60 elements on DGA, normal resin in batch experiments for various acids and acid concentrations, results are summarized in figures 8 – 10. Fig.8: kd values of 60 elements on normal DGA in HNO3, y-axis: kd in logarithmic scale, x-axis: HNO3 concentration in mol.L-1 (measurements at 0.1, 1, 3, 6, 9 und 12 mol.L-1) 10-110010110-1100101102103104105106 0ppm Fe 100ppm Fe 500ppm Fe 1000ppm Fe50-100 mm, 1 h contact time, 22(1)oC k'[HCl], ?10-110010110210-1100101102103104105106AlInGaFeTl Fe In Ga Tl Bi Al50-100 mm, 1 h contact time, 22(1)oC k'[Metal], m?Bi LITERATURE STUDY 5 Fig.9: kd values of 60 elements on normal DGA in HCl, y-axis: kd in logarithmic scale, x-axis: HCl concentration in mol.L-1 (measurements at 0.1, 1, 3, 6, 9 und 10 mol.L-1) Fig.10: kd values of 12 elements on normal DGA, 0.2M HF / xM HNO3 (x = 0.1, 1, 3, 6, 9, 12), y-axis: kd in logarithmic scale, x-axis: HNO3 concentration in mol.L-1 The authors further performed an elution study using a multi-element solution containing 33 elements on a 2 mL DGA, normal cartridge using a vacuum box system. The sample was loaded from 3M HNO3 / 0.2M boric acid, results and separation conditions are summarized in fig. 11. Fig.11: Elution study, 33 elements, 2 mL DGA, normal cartridge Bibliography (1) Horwitz E.P., McAlister D.R., Bond A.H., Barans R.E., Solvent Extrac. Ion Exch.,23, 219 (2005). (2) Horwitz E.P., Bond A.H., Barans R.E., McAlisterD.R., 27th Actinide separations Conferences, (2003) (3) Horwitz, E.P.; et al, Solv. Extr. Ion Exch., 26(1), in press (2008) (4) Maxwell III, S. L.; Culligan, B. K., Journ. Radioanal. Nucl. Chem., 270 (3), 699 (2006) (5) Maxwell III, S. L.; Journ. Radioanal. Nucl. Chem., 275 (2), 395 (2008) (6) Pourmand A, Dauphas N, Talanta, 81(3), 741 – 753 (2010)