This method was applied to the determination of a ferroniobium certified reference material and the results compare favourably with the certified values.

用本法测定一铌铁标样，测定值与认定值相吻合。

Certified reference material of the high-purity silicasol was prepared by removing impurity ions from the high purity silicasol according to the ion exchange resin.

采用离子交换法实现了高纯硅溶胶主成分与众多杂质离子的分离,并制备了高纯硅溶胶标准物质。