Blank spike duplicate

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A blank spike duplicate, as defined by the United States Environmental Protection Agency via its SEDD Specification Version 5.2, is "a second analysis of a blank spike. Data is expected to include an original lab sample ID and, potentially, a percent recovery, an RPD and an expected result for each analyte for which the analyte type is 'spike.' The original lab sample ID identifies the blank spike that was reanalyzed."[1]


  1. U.S. Environmental Protection Agency (March 2019). "Appendix A. Data Element Dictionary (DED)" (PDF). SEDD Specification Version 5.2. Retrieved 22 September 2022.