Application of 210Bi removal by anion exchange resin in 90Sr analysis
10.3760/cma.j.issn.0254-5098.2021.11.009
- VernacularTitle:阴离子交换树脂除 210Bi技术在 90Sr分析中的应用
- Author:
Zhou LI
1
;
Pengxiang LI
;
Xuyuan MA
;
Qinnan SONG
;
Zequan GAO
;
Yuhu HAN
;
Xiaona REN
Author Information
1. 中国辐射防护研究院，太原 030006
- Keywords:
90Sr analysis;
Bismuth removal;
Anion exchange resin
- From:
Chinese Journal of Radiological Medicine and Protection
2021;41(11):847-850
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To overcome the disadvantages of bismuth removal by bismuth sulfide precipitation method recommended by existing analytical standards and improve the quality of analytical result.Methods:Based on 201×7 anion exchange resin, the experimental process of bismuth removal was designed, and verified by using spiked samples and IAEA test samples.Results:Bismuth was removed by anion exchange resin. In the removal experiments of strontium, yttrium and bismuth, the chemical recovery rate of strontium and yttrium could reach (98.6 ± 0.8)% and (98.5 ± 0.7)%, respectively, with no Bi 2S 3 precipitation found. The relative standard deviation between analytical result and theoretical values was -2.97% to 5.94%, better than 3.96%-17.8% by the standard bismuth removal method. Through validation using IAEA test samples, the relative standard deviation between the reported value and the target value for 90Sr was between 3.40%-7.09%, and all the results were acceptable. Conclusions:Bismuth could be quantitatively removed using anion exchange resin without adsorption of strontium and yttrium. In addition, the bismuth removal solution system of anion exchange resin was the same as the elution system in 90Sr analysis, and the purpose of rapid bismuth removal could be achieved without conversion system. Compared with the current standard analytical method, it was feasible and better to quantitatively remove bismuth based on anion exchange resin, which could meet the needs of routine analysis of 90Sr.
