CAJ | 학술논문

基于三氧化钼易升华的特性,建立了一种纯化浓缩钼同位素试剂的新方法.采用天然丰度掺杂样品Synthetic-Mo对纯化过程中的氧化时间、样品加入量及真空蒸发温度等条件进行了优化.用高分辨等离子体质谱分析了样品中杂质的含量,计算得到纯化后95 Mo 和98 Mo 浓缩同位素试剂的纯度分别为99.992%和99.990%.通过多接收器等离子体质谱测定纯化前后样品中钼同位素的组成,δX/95 Mo( X=92,94,96,97,98,100)值均在仪器测量精度(<0.3‰)范围之内,未观察到明显的质量分馏现象.该方法能够满足校正质谱法对浓缩同位素试剂的要求,对建立高准确度的钼同位素丰度比测量方法具有重要意义.
기우삼양화목역승화적특성,건립료일충순화농축목동위소시제적신방법.채용천연봉도참잡양품Synthetic-Mo대순화과정중적양화시간、양품가입량급진공증발온도등조건진행료우화.용고분변등리자체질보분석료양품중잡질적함량,계산득도순화후95 Mo 화98 Mo 농축동위소시제적순도분별위99.992%화99.990%.통과다접수기등리자체질보측정순화전후양품중목동위소적조성,δX/95 Mo( X=92,94,96,97,98,100)치균재의기측량정도(<0.3‰)범위지내,미관찰도명현적질량분류현상.해방법능구만족교정질보법대농축동위소시제적요구,대건립고준학도적목동위소봉도비측량방법구유중요의의.
A novel purification method for isotopically enriched molybdenum was established according to the differences in sublimation temperature of MoO3 comparing with other species. The oxidation time, sample volume and sublimation temperature in this procedure were optimized using Synthetic-Mo with nature Mo com-positions. As measured by HR-ICP-MS, Mo could be effectively separated from other matrix elements, and the purities of 95 Mo and 98 Mo were 99.992% and 99.990%, respectively, after purification. Isotopic composi-tions of Synthetic-Mo and Purified-MoO3 samples were determined by MC-ICP-MS, theirδX/95Mo(X=92, 94, 97 , 98 , 100 ) values were indistinguishable within analytical uncertainty (<0.3‰) , revealing that isotopic fractionation of Mo was unlikely during purification. The proposed purification method is of great importance in developing high-accuracy measurement method for isotopic compositions of Mo.