Under the guidance and organization of IAEA and associate organization,quite a number of scientists have taken active part in this task,and a series of isotopic reference materials have been established and widely used.

• 在国际原子能机构等国际组织的组织和指导下 ,许多研究人员积极参与 ,逐步建立了一批应用广泛的同位素参考物质。