Environmental standard sample concentration blind sample and ring

      

　　Standard samples refer to materials and substances with one or more characteristic values that are sufficiently uniform and have been fully determined. They are mainly used to evaluate measurement methods, calibrate measurement instruments, or determine the characteristic values of other materials and substances. The standard sample work in our country started in the 1950s, and since the early 1980s, the standard has been officially incorporated into the standardization management work. So the editor of the National Standards Network reminds you that the concentration inquiry of environmental standard samples is a necessary skill for every laboratory personnel.

　　Environmental standard sample concentration query method

　　First open the website of the National Standards Network www.gbw.org.cn, and then enter the number or name of the standard sample in the search box and click Search, such as Search: GSB05-1142-2000 You can see the search results, as shown below


　　The concentration value of this standard sample is displayed under the specification catalog. However, there will still be some water quality and environmental standard samples because the batch number is changed too fast. The concentration of relevant standard samples is not provided on the national standard product website. For specific product concentration values, you can consult the online customer service of the National Standard Product Network.