描述制备参考溶液的程序、确保溶液浓度的质量和准确度的程序。分析化学家工作文件；为了简化应用程序，没有给出基本的统计理论。

Describes procedures for preparing reference solutions, procedures for ensuring the quality and the degree of accuracy of the solution strength. Working document for analytical chemists; the underlying statistical theorie is not presented in order to simplify application.