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放射性标准溶液属标准物质类,它是一种重要的标准器具,可用于量值和比对工作中。文中介绍了按制备放射性标准溶液的要求研制的~(60)Co,~(90)Sr-~(90)Y,~(137)Cs,~(134)Cs,~(63)Ni,~(241)Am,~(125)Ⅰ,~(131)Ⅰ等8个核素的标准溶液。选择溶液的介质条件为20～50μg稳定载体/g溶液,酸度为0.1 mol/L的盐酸。碘的放射性溶液调成碱性并加入适当量的稳定剂。溶液经过长期的考察是均匀和稳定的,量值准确可靠。给出的上述核素标准溶液不确定度分别为:0.10％,0.27％,0.18％,0.12％,0.24％,0.18％,0.20％,0.22％(1σ)。
Radioactive standard solution is a standard substance, it is an important standard equipment, can be used for the value and comparison work. In this paper, the preparation methods of ~ (60) Co, ~ (90) Sr ~ 90 Y, ~ 137 Cs, 134 Cs, ~ 63 Ni, 241) Am, ~ (125) Ⅰ, ~ (131) Ⅰ and other eight nuclides standard solution. Medium conditions for the selection of the solution 20 ~ 50μg stable carrier / g solution, the acidity of 0.1mol / L hydrochloric acid. The iodine radioactive solution is made alkaline and added with the appropriate amount of stabilizer. Long-term solution after the study is uniform and stable, the amount of accurate and reliable. The uncertainty of the nuclide standard solutions given above is 0.10%, 0.27%, 0.18%, 0.12%, 0.24%, 0.18%, 0.20%, 0.22% (1σ) respectively.