Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in April 1994; T-129 (trace constituents), M-130 (major constituents), N-42 (nutrients), P-22 (low ionic strength), and Hg-18 (mercury)

H. Keith Long; Jerry W. Farrar

doi:10.3133/ofr94369

Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in April 1994; T-129 (trace constituents), M-130 (major constituents), N-42 (nutrients), P-22 (low ionic strength), and Hg-18 (mercury)

Open-File Report 94-369

By: H. Keith Long and Jerry W. Farrar

https://doi.org/10.3133/ofr94369

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Abstract

This report presents the results of the U.S. Geological Survey's analytical evaluation program for five standard reference samples--T-129 (trace constituents), M-130 (major constituents), N-42 (nutrients), P-22 (low ionic strength), Hg-18(mercury),--that were distributed in April 1994 to 157 laboratories registered in the U.S. Geological Survey sponsored interlaboratory testing program. Analytical data that were received from 133 of the laboratories were evaluated with respect to: overall laboratory performance and relative laboratory performance for each analyte in the five 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 five standard reference samples. The most probable value for each analyte was determined using nonparametric statistics.

Suggested Citation

Long, H.K., Farrar, J.W., 1994, Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in April 1994; T-129 (trace constituents), M-130 (major constituents), N-42 (nutrients), P-22 (low ionic strength), and Hg-18 (mercury): U.S. Geological Survey Open-File Report 94-369, iii, 101 p. :ill. ;28 cm., https://doi.org/10.3133/ofr94369.

ISSN: 2331-1258 (online)

Additional publication details
Publication type	Report
Publication Subtype	USGS Numbered Series
Title	Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in April 1994; T-129 (trace constituents), M-130 (major constituents), N-42 (nutrients), P-22 (low ionic strength), and Hg-18 (mercury)
Series title	Open-File Report
Series number	94-369
DOI	10.3133/ofr94369
Year Published	1994
Language	ENGLISH
Publisher	U.S. Geological Survey ; Books and Open-File Reports [distributor],
Description	iii, 101 p. :ill. ;28 cm.