Development of an extractive-scintillating chromatographic resin for the detection of radioactive isotopes

Extractive-scintillating resin produced by radiation polymerization

“…We have shown that the scintillating properties of the resin material are just as good as that of a standard liquid scintillation cocktail. In our previous work (Vincze et al, 2007) we have shown, that the ion binding capacity of this resin is also excellent, and having its maximum in the pH range of 5-7, making it ideal for the continuous monitoring of natural water samples.…”

“…It has been reported that if the DEGMA monomer in a good solvent is irradiated, below about 20 w/w% monomer concentration monodisperse microspheres are formed (Yoshida and Kaetsu, 1987), between 20 and 40 w/w% monomer concentration monolith formation can be observed (Grasselli et al, 2001;Vincze et al, 2007), and further increase in monomer concentration leads to the formation of a glassy polymer gel. When styrene, a monomer needed for the improvement of the energy transfer from the nuclear radiation to the fluorescent molecules in the matrix (a well-known phenomenon in the field of plastic scintillation detectors; L'Annunziata, 2003) was added to DEGMA, even at monomer concetrations below 20 w/w%, with increasing styrene concentration microsphere formation turned to resin formation, as illustrated in Fig.…”

“…The detailed synthesis of these molecules, the fluorescent and adsorption properties of the resin are published elsewhere (Vincze et al, 2007). The key molecules of a Ethyl-acetate and chloroform solutions with co-monomer compositions that was given in Table 1 were prepared, degassed with nitrogen and irradiated with a 60 Co gamma source at room temperature without stirring, with a dose rate of 15 kGy/h and a dose of 30-100 kGy.…”

“…In one of our recent papers a possible synthesis of such a chemically stable resin material has been demonstrated (Vincze et al, 2007). It has been shown that a chemically stable macroporous scintillating polymer resin can be synthesized by gamma-ray-induced precipitation polymerization technique from the solution of 2-(4-allyloxyphenyl)-5-phenyl oxazole, 5-(allyloxy-phenyl)-2-[4-(5-phenyl-oxazole-2-il)-phenyl] oxazole, diethylene glycol dimethacrylate (DEGMA), styrene and the allyl derivative of a 18C6 crown ether-dicarbolic acid complexing agent.…”

Radiation polymerization and crosslinking: A viable alternative for synthesis of porous functional polymers

“…The results showed that the ability of our resin matrix to detect radioactivity is just as good as of the standard liquid scintillation cocktail generally used in liquid scintillation spectroscopy for the detection of alpha/betaemitting nuclides (Vincze et al, 2007b). Considering that the ionbinding capacity of this resin is also excellent (Vincze et al, 2007a) with a maximum in the pH range 5-7, this makes it ideal for the continuous monitoring of natural water samples.…”