铀微粒同位素分析在核保障环境监测中发挥着重要的作用。为保证准确测量单个微粒中铀同位素比的精度与准确度,需要使用已知丰度和适宜尺寸的标准微粒。本工作通过建立实验装置,制备了所需的单分散铀氧化物微粒标准物质,并通过扫描电子显微镜(SEM)、能谱(EDX)和二次离子质谱(SIMS)对其进行了表征。 Uranium Particle Isotopic Analysis plays an important role in nuclear environmental monitoring. To ensure accurate and accurate uranium isotope ratios in a single particle, standard particles of known abundance and size are required. In this work, the desired monodispersed uranium oxide microparticle standard material was prepared by the establishment of an experimental device and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX) and secondary ion mass spectrometry (SIMS).