New reference materials (RMs), zirconium silicate, bauxite and phosphogypsum, were produced and characterized according to an ISO guide. The homogeneity of the three RMs was evaluated using X-ray fluorescence (XRF), and characterizations of the three candidate materials were performed through a collaborative study with nine expert radioanalytical laboratories. The assigned radionuclides are ²³⁰Th, ²³²Th, ²³⁴U, ²³⁵U, and ²³⁸U for zirconium silicate; ²³⁰Th, ²³²Th, ²³⁴U, and ²³⁸U for bauxite; and ²²⁶Ra, ²³⁰Th, ²³⁴U, and ²³⁸U for phosphogypsum.

中文翻译：

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天然放射性物质（NORM）的新参考物质的制备和评估：硅酸锆，铝土矿和磷石膏

根据ISO指南生产并表征了新的参考材料（RM），硅酸锆，铝土矿和磷石膏。使用X射线荧光（XRF）评估了三个RM的均一性，并通过与九个放射分析实验室的合作研究对三种候选材料进行了表征。硅酸锆的放射性核素分别为²³⁰ Th，²³² Th，²³⁴ U，²³⁵ U和²³⁸ U；铝土矿为²³⁰ Th，²³² Th，²³⁴ U和²³⁸ U; 和²²⁶ Ra，²³⁰ Th，²³⁴ U和磷石膏为^238U。