用聚酰胺树脂从~(99)Mo中提取~(99)Tc~m

固相分离材料是色层法从低比活度~(99)Mo料液中分离医用同位素~(99)Tc~m的关键。采用静态吸附和动态吸附淋洗实验,研究了聚酰胺树脂从~(99)Mo中吸附分离其衰变子体~(99)Tc~m的工艺,评价了其性能。结果表明:在NaOH浓度为3mol/L的钼酸钠溶液中,聚酰胺树脂能够在10s内选择性地吸附高锝酸根离子,并具有3.85mg/g的饱和吸附容量。2.0g装柱量的聚酰胺色层柱的漏穿体积约为70 mL,可用25 mL 3 mol/L NaOH溶液洗涤柱上残留的钼酸根离子,最后20mL水即可将吸附在聚酰胺色层柱上的锝淋洗下来。本研究为开发基于色层法的全自动~(99)Mo/~(99)Tc~m发生器装置提供了一种新型钼锝固相分离材料,其提取锝的淋洗效率为98%,洗脱液中钼的残留为0.6mg/L。

Extraction of 99Tcm From 99Mo by Polyamide Resin

Solid extraction reagent is the key of separating medical isotope ⁹⁹Tc^m from low specific activity ⁹⁹Mo solution using chromatography. The static adsorption and dynamic adsorption elution experiments have been conducted to study the process and performance of polyamide resin separation ⁹⁹Tc^m from its mother nuclide ⁹⁹Mo. The results show that: polyamide resin can selectively adsorb pertechnetate ions in 10 s, and with 3.85 mg/g saturated adsorption capacity in 3 mol/L NaOH solution. The breakthrough volume of 2.0 g polyamide chromatographic column is about 70 mL, and permolybdate ion remaining on column can be washed by 25 mL 3 mol/L NaOH solution. At last 20 mL water can be used for eluting technetium adsorbed on the polyamide chromatographic column. The research shows that: a novel solid extraction reagent for separation molybdenum and technetium has been developed for automatic ⁹⁹Mo/⁹⁹Tc^m generator. The yield of separation technetium is 98%, and residual concentration of molybdenum is 0.6 mg/L in eluate.