Separation of 97Ru from niobium target using PEG based aqueous biphasic systems

Abstract

Separation of no-carrier-added (NCA) 97 Ru from bulk niobium target has been carried out for the first time using green analytical technique, aqueous biphasic system. 50 % (w/v) polyethylene glycol (PEG)-4000, against 2 M solutions of various salts such as Na-citrate, and 4 M KOH were employed at room temperature for the extraction of NCA 97 Ru from bulk niobium. Influence of molecular weight of PEG rich phase as well as pH of some salt rich phase (e.g., Na-tartarate) on the extraction behaviour of NCA 97 Ru into PEG rich phase was also observed. In the presence of sodium-tartarate salt solution, when volume of PEG-4000: Na-tartarate was 3:1, 91 % of NCA 97 Ru was extracted into the PEG rich phase without any contamination of niobium target. Dialysis of PEG rich phase containing NCA 97 Ru was carried out against deionised water to obtained pure NCA 97 Ru.

Across the energy scale: from eV to GeV

“…nat Y [63]. In both the cases the target is monoisotopic in nature, i.e., 93 Nb and 89 Y have 100 % natural abundance. It has been found for 7 Li-induced reaction that below 32 MeV projectile energy contaminations from other coproduced radionuclides are negligible.…”

“…= 2.44 MeV) is useful in positron emission tomography, 95 Tc (T 1/2 = 20 h) is important in monitoring slow metabolic functions of brain and heart, etc. Following the protocol, for the first time we have investigated heavy ion induced production route of neutron deficient 93,94,95 Tc radionuclides by bombarding 9 Be on natural yttrium target ( 89 Y, 100 % natural abundance). Attempt has been made to develop different radiochemical separation technique for isolation of NCA Tc radionuclides from the bulk target matrix [53,54].…”

“…It was observed that NCA At radionuclides quantitatively extracted to PEG-4000 rich phase without any contamination from bulk lead when 2 M solution of Na 2 SO 4 , or Na 2 CO 3 were used as salt rich phase. Another example is separation of clinically important 97 Ru from 7 Li-irradiated bulk niobium target using PEG based ABS [93]. The efficacy of separation of 97 Ru and bulk Nb was tested with PEG-4000, PEG-6000, PEG-20000, and various salts like Na 2 CO 3 , Na-citrate, Na-tartarate, Na-malonate, NaHSO 3 , Na 2 SO 4 , Na 2 S 2 O 3 , K 2 HPO 4 , K 3 PO 4 , K 2 CO 3 and KOH.…”

Natural Flavonoids as Superior Reagents for Separation of Clinically Important Zr Radionuclides

“…Over a decade, our continuous endeavour was to use green chemistry mandates in radiochemical experiments 20 . Earlier, in 'Radio-green Chemistry' experiments we have used many environmental friendly benign bio reagents like Poly (N-vinylpyrrolidone) [21][22] , polyethylene glycol [23][24] and many plant biomaterials [25][26][27] .…”

Aqueous biphasic separation of97Ru and95,96Tc from yttrium

“…Roger et al reported the partitioning behavior of pertechnetate using a PEG-ABS system. 3,5,6 Over the last ten years, our laboratory has made continuous endeavors to develop new green separation methodologies, using aqueous biphasic systems [7][8][9][10][11][12][13][14][15][16] or other environmentally benign reagents such as polyvinylpyrrolidone 17,18 and ionic liquids. 19 In this study, we made an attempt to separate Ru and Tc radionuclides from bulk yttrium target.…”