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Results of the U. S. Geological Survey's analytical evaluation program for standard reference samples distributed in April 2001

Open-File Report 2001-287
By:  and 
https://doi.org/10.3133/ofr01287

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Abstract

This report presents the results of the U.S. Geological Survey's analytical evaluation program for six standard reference samples -- T-165 (trace constituents), M-158 (major constituents), N-69 (nutrient constituents), N-70 (nutrient constituents), P-36 (low ionic-strength constituents), and Hg-32 (mercury) -- that were distributed in April 2001 to laboratories enrolled in the U.S. Geological Survey sponsored interlaboratory testing program. Analytical data received from 73 laboratories were evaluated with respect to overall laboratory performance and relative laboratory performance for each analyte in the six reference samples. Results of these evaluations are presented in tabular form. Also presented are tables and graphs summarizing the analytical data provided by each laboratory for each analyte in the six standard reference samples. The most probable value for each analyte was determined using nonparametric statistics.

Suggested Citation

Woodworth, M., Connor, B., 2001, Results of the U. S. Geological Survey's analytical evaluation program for standard reference samples distributed in April 2001: U.S. Geological Survey Open-File Report 2001-287, 110 p., https://doi.org/10.3133/ofr01287.

ISSN: 2331-1258 (online)

Publication type Report
Publication Subtype USGS Numbered Series
Title Results of the U. S. Geological Survey's analytical evaluation program for standard reference samples distributed in April 2001
Series title Open-File Report
Series number 2001-287
DOI 10.3133/ofr01287
Year Published 2001
Language ENGLISH
Contributing office(s) Standard Reference Sample Project- Branch of Quality Systems
Description 110 p.
Additional publication details