Review on Statues of Reference Materials in Different Countries

To summarize the statues of reference materials in different countries. All the data were collected through website databases of different organizations and countries, such as International Organization for Standardization/Committee on reference materials(ISO/REMCO), CO de d'Indexation des MA tériaux de Référence(COMAR), United States, European Countries, Japan and China. The reference material developing trends of China in recent 6 years were analyzed. And the challenges that studies on reference materials in China faced were discussed.