thumbnail

Results of the U.S. Geological Survey's Analytical Evaluation Program for standard reference samples distributed in March 1999

Open-File Report 99-259

By:
and

Links

Abstract

This report presents the results of the U.S. Geological Survey's analytical evaluation program for 8 standard reference samples -- T-157 (trace constituents), M-150 (major constituents), N-61 (nutrient constituents), N-62 (nutrient constituents), P-32 (low ionic strength constituents), GWT-5 (ground-water trace constituents), GWM- 4 (ground-water major constituents),and Hg-28 (mercury) -- that were distributed in March 1999 to 120 laboratories enrolled in the U.S. Geological Survey sponsored interlaboratory testing program. Analytical data that were received from 111 of the laboratories were evaluated with respect to overall laboratory performance and relative laboratory performance for each analyte in the seven 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 8 standard reference samples. The most probable value for each analyte was determined using nonparametric statistics.

Additional Publication Details

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 March 1999
Series title:
Open-File Report
Series number:
99-259
Edition:
-
Year Published:
1999
Language:
ENGLISH
Contributing office(s):
Standard Reference Sample Project- Branch of Quality Systems
Description:
iii, 166 p. : ill. ; 28 cm.