标准物质——经美国国家标准局(NBS)就其一个或几个化学或物理性能进行测定并获得证书的物质是一种非常重要的传递手段,已得到愈来愈广泛的应用。到1980年初,NBS 已发布了70大类标准物质,共计900多种,工业质量控制采用了其中的700多种。销售量最大的类目用在工业质量控制中,销售量发展最快的类目用在医疗和环境领域。在美国,标准物质的用途如下: Reference Materials - Substances that have been measured and certified by the National Bureau of Standards (NBS) for one or more of their chemical or physical properties are a very important means of delivery and have been used more and more widely. By the early 1980s, NBS had released 70 major categories of standard substances for a total of more than 900 and more than 700 of them were used in industrial quality control. The categories with the highest sales volumes are used in industrial quality control and the categories with the highest sales volumes are used in the medical and environmental fields. In the United States, the use of standard substances is as follows: