A batch, as defined by the United States Environmental Protection Agency via its SEDD Specification Version 5.2, is "the primary mechanism for associating quality control samples with regular ones." The EPA notes that "analytical data review requires this association to assess the impact of quality control sample performance to the quality of the regular sample results." In common laboratory practice, however, a batch may also simply be a grouping of two or more associated samples.
- U.S. Environmental Protection Agency (March 2019). "Appendix A. Data Element Dictionary (DED)" (PDF). SEDD Specification Version 5.2. https://www.epa.gov/sites/default/files/2019-05/documents/sedd_spec_v5-2-march_2019_508.pdf. Retrieved 22 September 2022.
- "Quality Control Sample Processing and Batches" (PDF). Wisconsin Department of Natural Resources. July 2008. https://dnr.wi.gov/topic/labcert/documents/guidance/092QC_SampSeq.pdf. Retrieved 22 September 2022.