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本文叙述了核工业总公司系统铀化合物能力测试（1998）样品溶液中测量项目参考值的不确定度评定。概述了不确定度评定的一般程序；评定了由GBW04205标准物质生成分铀、GBW（E）080310等7种标准溶液、标准物质杂项成分与标准溶液等3种类型制备方法制备的样品溶液中各测量项目参考值不确定度；评定了制备溶液常用计量器具（如电子天平、精密天平、移液管、容量瓶等）计量值的不确定度。
This paper describes the evaluation of the uncertainty of the reference value of the measurement items in the sample solution of the uranium compound capability test of the Nuclear Industry Corporation (1998). The general procedure for evaluating the uncertainty is summarized. The sample solution prepared by three kinds of preparation methods of standard uranium, GBW (E) 080310 and other standard solutions of GBW04205, standard miscellaneous components and standard solutions Uncertainty of the reference value of the measurement item; The uncertainty of the measurement value of the commonly used measuring instruments (such as electronic balance, precision balance, pipette, volumetric flask, etc.) of the preparation solution was evaluated.