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Development of rapid solvent extraction based radioanalytical technique for estimation of 90Sr in the presence of natural and anthropogenic radionuclides |
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| Authors: | Reddy Priyanka J Pulhani Vandana Dhole S D Dahiwale S S Bhade S P D Anilkumar S Singh Rajvir |
| Institution: | 1.Radiation Safety Systems Division, Bhabha Atomic Research Centre, Trombay, India ;2.Health Physics Division, Bhabha Atomic Research Centre, Trombay, India ;3.Department of Physics, Savitribai Phule Pune University, Pune, India ; |
| Abstract: | A radiochemical technique for estimation of 90Sr concentration by direct extraction of 90Y with bis (2-ethylhexyl) phosphate (HDEHP) in toluene was developed and standardized. About 90% 90Sr retained in the aqueous phase at the optimized pH 4–4.5. Cerenkov counting with 0.04 g mL−1 sodium salicylate as a wavelength shifter resulted in 7.5 fold increase its Cerenkov counting efficiency. The method was validated by estimating 90Sr in certified reference materials like, IAEA TEL 2016-03 drinking water, Spruce needle and IAEA-156 Clover. The interference of naturally occurring Ra and its β progeny especially Pb was eliminated by means of Cerenkov counting. Conventional radiochemical separation was used to compare 90Sr activity in effluent samples. |
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