Which type of control samples is used to determine accuracy in tests?

Certified reference material is essential in laboratory testing to determine the accuracy of measurement results. These materials are standardized and characterized for specific properties, which means they possess known values that are traceable to a national or international standard. By analyzing certified reference materials, lab analysts can compare their test results against these known values to assess the accuracy of their measurement methods.

Using certified reference materials allows laboratories to verify that their testing processes produce reliable and valid results. This verification helps to demonstrate compliance with standards and regulations, ultimately ensuring the integrity of the data produced in laboratory analyses. When accuracy is the goal, certified reference material serves as a benchmark for evaluating performance and identifying any discrepancies in the testing process.