An analytical standard is a compound of high purity and known concentration to be used to confirm the presence of specific components in mixtures, to increase the precision of quantitative analysis, to perform a test or a calibration of an analyzer and for other purposes. The characteristic value of this reagent should have good accuracy, and it should also be able to convert with the SI unit, and a consistent standard value can be obtained, which is determined by an accurate standardized method. The determination and use of standard reagents are international. Learn more: https://reagents.alfa-chemistry.com/products/analytical-standards.html