Degueldre C, Favarger P-Y, Rossé R, Wold S
Department Nuclear Energy and Safety, Paul Scherrer Institut, 5232 Villigen-PSI, Switzerland.
Talanta. 2006 Jan 15;68(3):623-8. doi: 10.1016/j.talanta.2005.05.006. Epub 2005 Jun 23.
Uranium single particle analysis has been performed by inductively coupled plasma-mass spectrometry (ICP-MS) and the performances are compared with that provided by scanning electron microscopy and single particle counting. The transient signal induced by the flash of ions due to the ionisation of an uranium colloidal particle in the plasma torch can be detected and measured for selected uranium ion masses ((238)U(+), (235)U(+) or (254)(238)U(16)O) by the mass spectrometer. The signals recorded via time scanning are analysed as a function of particle size or fraction of the studied element or isotope in the colloid phase. The frequency of the flashes is directly proportional to the concentration of particles in the colloidal suspension. The feasibility tests were performed on uranium dioxide particles. The study also describes the experimental conditions and the choice of mass to detect uranium colloids in a single particle analysis mode.
已通过电感耦合等离子体质谱法（ICP-MS）进行了铀单颗粒分析，并将其性能与扫描电子显微镜和单颗粒计数法的性能进行了比较。由于等离子体炬中铀胶体颗粒的电离而产生的离子闪光所诱导的瞬态信号，可以通过质谱仪针对选定的铀离子质量（（238）U（+）、（235）U（+）或（254）（238）U（16）O）进行检测和测量。通过时间扫描记录的信号作为颗粒大小或胶体相中所研究元素或同位素的分数的函数进行分析。闪光频率与胶体悬浮液中颗粒的浓度成正比。对二氧化铀颗粒进行了可行性测试。该研究还描述了单颗粒分析模式下检测铀胶体的实验条件和质量选择。
