A method batch, as defined by the United States Environmental Protection Agency via its SEDD Specification Version 5.2, is "a laboratory-defined identifier that is used to link multiple samples analyzed by one method and treated as a group for quality control (QC) purposes. A method batch should group samples with similar matrices and potential interferences." The EPA adds the following:
This is a broader grouping than a preparation batch. In particular, a reanalysis of a sample stays in the same method batch, while it is likely to be in a different preparation batch. Operationally, this batch associates sample dependent QC such as duplicates and matrix spikes with a group of samples that may or may not be prepared at the same time.
- 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.