化学成分分析量值的溯源性与其它物理量量值溯源性的最大的区别在于它对测量方法及测量方法的前处理的依赖性极大。化学成分量值溯源链在测量的前处理过程中,处在断裂的状态。前处理的首要任务是保证以尽量小的不确定度恢复溯源链。成分分析量值的溯源性与不确定度对相应的测量方法的前处理过程的依赖性往往大于其它过程。 The most striking difference between traceability of chemical composition analysis and traceability of other physical quantities lies in their dependence on measurement methods and pretreatment of measurement methods. The chemical composition traceability chain is in a ruptured state during the measurement of the pretreatment process. The first priority of preprocessing is to ensure that traceability chains are restored with as little uncertainty as possible. Traceability and uncertainty of the component analysis of the value of the corresponding measurement methods, the dependence of the pre-treatment process is often greater than other processes.