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结合高温气冷堆对基体石墨的纯度要求，用耦合式等离子发射光谱仪对球形燃料元件基体石墨及原材料中的微量及痕量杂质元素质量分数进行了分析，并讨论了基体石墨制造过程对其杂质元素质量分数的影响。利用等离子发射光谱仪、离子选择性电极和离子色谱等对Ｂ、Ｌｉ、Ｆｅ、Ｔｉ、Ｕ、Ｔｈ、Ｇｄ、Ｅｕ、Ｓｍ 、Ｄｙ、Ｆ和Ｃｌ等十几个重要元素进行了分析。研究结果表明： 基体石墨中的杂质主要来源于原材料中的杂质，在球形燃料元件制造过程中所使用的原材料及制成的基体石墨均符合球形燃料元件的设计指标。
According to the purity requirement of matrix graphite in high-temperature gas-cooled reactor, the mass fraction of trace and trace impurity elements in graphite and raw materials of spherical fuel element matrix was analyzed by the coupled plasma emission spectrometer. The effects of substrate graphite manufacturing process on its impurity Effect of elemental mass fraction. More than ten important elements such as B, Li, Fe, Ti, U, Th, Gd, Eu, Sm, Dy, F and Cl were analyzed by using plasma emission spectrometer, ion selective electrode and ion chromatography. The results show that the impurities in the matrix graphite mainly come from the impurities in the raw materials. The raw materials used in the manufacture of the spherical fuel elements and the matrix graphite prepared conform to the design specifications of the spherical fuel elements.