Material used for the purposes of quality control and subjected to the same or part of the same
measurement procedure as that used for analytical samples.
Note: Blank materials, analytical samples, reference materials, and certified reference materials can be used as quality control materials.
Source:
PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1035 (https://doi.org/10.1515/pac-2019-0819)