Inter-regional and inter-state quality assurance for PAMS: Regional Reference Laboratory round robin comparisons
- Environmental Protection Agency, Edison, NJ (United States). Region 2
- Environmental Protection Agency, Lexington, MA (United States)
- Environmental Protection Agency, Philadelphia, PA (United States). Region 3
- Maryland Dept. of the Environment, Baltimore, MD (United States)
To ensure data comparability between the various State agencies conducting PAMS monitoring in EPA Regions 1, 2, and 3, a Regional Reference Laboratory (RRL) was designated for each of these three EPA Regions. Three round robin samples were analyzed by each of the RRLs to determine the inter-laboratory variability. Each of the round robin samples contained an ambient air sample, which was collected in passivated stainless steel canisters. Pollutant concentrations ranged from < 1 ppbC to 30 ppbC. For compounds present in the sample at concentrations > 5 ppbC, % differences between the three RRLs were < 30% except for 2 instances. For compounds present in the sample at concentrations of 0--5 ppbC, % differences between RRLs were < 30% approximately 3/4 of the time. Analysis of round robin samples conducted later in the monitoring season showed improved results relative to the earlier samples. Compound identification was consistent across all three laboratories with few false positives or false negatives evident.
- OSTI ID:
- 197337
- Report Number(s):
- CONF-9405167-; TRN: IM9612%%111
- Resource Relation:
- Conference: Measurement of toxic and related air pollutants, Durham, NC (United States), 3-6 May 1994; Other Information: PBD: 1994; Related Information: Is Part Of Measurement of toxic and related air pollutants. Proceedings of the 1994 U.S. EPA/A and WMA international symposium; PB: 1075 p.
- Country of Publication:
- United States
- Language:
- English
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