From the view of uncertainty the chain of traceability and its continuity of chemical ingredients, the function of the CRMs in chemical analysis and the realization of the traceability of the value of the CRMs are discussed.

• 从不确定度的角度论述了化学成分量值的溯源链及其连续性；有证参考物质在化学测量中的作用以及有证参考物质量值溯源性的实现。