【作者】 邓辉； 梁帮宏； 张舸； 杨彬；

【Author】 DENG Hui LIANG Bang-hong ZHANG Ge YANG Bin (Nuclear Power Institute of China,Chengdu 610005,China)

【机构】 中国核动力研究设计院；

【摘要】 <正>钼（Mo）的原子序数是42,有7个稳定同位素⁹²Mo、⁹⁴Mo、⁹⁵Mo、⁹⁶Mo、⁹⁷Mo、⁹⁸Mo 和¹⁰⁰Mo。 Mo 广泛分布于自然界的辉钼矿和陨石中,Mo 也是动植物所必需的微量营养元素,钼同位素丰度的更多还原

【Abstract】 We established a analytical method for determining isotope ratios of molybdenum by negative thermal ionization mass spectrometry（NTIMS）.A double rhenium filament technique was employed for sample evaporation and ionization.A solution containing St（NO₃）₂ was loaded onto the evaporation filament to depress the work function of rhenium,thus enhancing the yield of negative ions.The technique is optimized for the determination of Mo down to 1 μg,which still secure stable and lasting signals of MOO₃^-.The precision of 0.02%-0.17%（RSD）is accomplished with samples of 1 μg Mo about measurement time of 10-15 min.更多还原