Round Robin Analyses: (1) EP Toxicity Test: (2) ASTM Water Leach Test
1988-01-15
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Round Robin Analyses: (1) EP Toxicity Test: (2) ASTM Water Leach Test
Published Date
1988-01-15
Publisher
University of Minnesota Duluth
Type
Technical Report
Abstract
The Natural Resources Research Institute supervised and evaluated a
round robin analyses for the EP Toxicity and ASTM Water Leach tests
on samples of incinerator fly ash. Samples were distributed to 14
laboratories for analyses. The leachates were analyzed for Pb, Cd,
Hg, As and Se. Statistical analyses of the Pb and Cd data from the
EP Toxicity tests give unreliable results for Pb with somewhat
better reproducibility for the Cd. The Pb variability within, and
between laboratories was very high and a single data point or
single test result would be statistically meaningless. The
corresponding analyses for Cd are somewhat better. The results for
Hg, As and Se are too low for proper evaluation.
The results from the ASTM Water Leach test were inconclusive
because much of the data reported was below the limits of detection.
We assume that the wide variations among the values reported for Pb
are in large part related to the extraction step; i.e., the Cd data
are better and the Cd compounds are more readily soluble. The data
do not permit differentiation between errors related to extraction
and those related to the analytical step. It appears logical that
the control parameters applied to the extraction procedure are not
sufficiently precise.
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Prepared for: Minnesota Waste to Energy Association
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Natural Resources Research Institute, University of Minnesota, Duluth, 3151 Miller Trunk Highway, Duluth, Minnesota 55811
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Bleifuss, Rodney L; Niles, Harlan B; Engesser, John. (1988). Round Robin Analyses: (1) EP Toxicity Test: (2) ASTM Water Leach Test. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/188491.
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