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PUBLICATIONS

Environmental Protection Agency Blind Audit 2018

Published

Author(s)

Christina Cecelski, Cassie Goodman, Jennifer Carney

Abstract

The U.S. Environmental Protection Agency (EPA) conducted a blind audit of EPA protocol calibration gas mixtures produced by specialty gas manufactures. The objective was to determine the amount-of-substance fraction (concentration) of the analytes in the mixtures, and to compare the quantified values with those stated in the producers' certificates. The mixtures included in this audit consisted of carbon dioxide (CO2) at 8 % mol/mol to 18 % mol/mol; nitric oxide (NO) at 50 µmol/mol to 800 µmol/mol (ppm) [with total oxides of nitrogen (NOx) within 1 % relative of NO]; and sulfur dioxide (SO2) at 75 µmol/mol to 900 µmol/mol (ppm). The quality of these calibration mixtures is critical for the accurate determination and reporting of regulated gaseous emissions.
Citation
PGVP Audit Results
Pub Weblink
https://www.epa.gov/airmarkets/pgvp-audit-results
Pub Type
Websites

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Keywords

EPA Audit, PGVP, EPA Protocol Gas Mixtures, Protocol Gas Verification Program
Environment, Analytical chemistry and Amount of substance

Citation

Cecelski, C. , Goodman, C. and Carney, J. (2021), Environmental Protection Agency Blind Audit 2018, PGVP Audit Results, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=931862, https://www.epa.gov/airmarkets/pgvp-audit-results (Accessed October 13, 2025)

Issues

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Created May 17, 2021, Updated November 29, 2022
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