什么是CRM
CRM简言之，认证参考材料（CRM）是一种用于方法开发、方法验证的材料，特别是用于检查方法偏差或校准的材料。正如《计量词汇》中所定义的那样，正式答案是：CRM是一种参考材料，附有证书，其一个或多个特性值通过一个程序进行认证，该程序建立了精确实现特性值所用单位的可追溯性，并且每个认证值都伴随着所述置信水平的不确定性。
What is a CRM?
In a nutshell, a certified reference material (CRM) is a material which is used for method development, method validation, in particular to check for method bias, or for calibration. The formal answer – as defined in the Vocabulary of Metrology – is: a CRM is a reference material, accompanied by a certificate, one or more of whose property values are certified by a procedure which establishes traceability to an accurate realisation of the unit in which the property values are expressed, and for which each certified value is accompanied by an uncertainty at a stated level of confidence.