狠狠色丁香婷婷综合久小说久,国产亚洲精品第一综合另类 ,亚洲av无码精品色午夜飞机馆,国产无套码AⅤ在线观看

European reference materials  ERM  
歐洲標準局標準物質(zhì)Institute of Reference Materials and Measurement  

Three major European reference materials producers have combined forces to produce a brand new standard in reference materials to ensure reliability and comparability of the results of chemical analysis.

European Reference Materials are certified materials, which undergo uncompromising peer evaluation and offer highest quality and reliability.

They are a major tool for improving the confidence in, and the mutual recognition of test results and certificates in a global market. CRMs comply with high metrological requirements, ensuring traceability of measurements results, and are the end-point of the traceability chain, thus being primary standards in chemistry.