Report of the Usgs's Evaluation Program for Standard Reference Samples Distributed in April 1993: T-123, T-125, M-126, N-38, N-39, P-20 and Hg-16: Usgs Open-File Report 93-436 - Softcover

Long, H K; Farrar, J W

Softcover

ISBN 10: 1288955502 ISBN 13: 9781288955503

Publisher: Bibliogov, 2013

Synopsis

This report presents the results of the U.S. Geological Survey's analytical evaluation program for seven standard reference samples--T-123 (trace constituents), T-125 (trace constituents), M-126 (major constituents), N-38 (nutrients), N-39 (Nutrients), P-20 (precipitation-low ionic strength), and Hg-16 (mercury)--that were distributed in April 1993 to 175 laboratories registered in the U.S. Geological Survey sponsored interlaboratory testing program. Analytical data received from 131 of the laboratories were evaluated with respect to: overall laboratory performance and relative laboratory performance for each analyte in the 7 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 seven standard reference samples. The most probable value for each analyte was determined using nonparametric statistics.

Edition details

• Publisher: Bibliogov
• Publication date: 2013
• Language: English
• ISBN 10: 1288955502
• ISBN 13: 9781288955503
• Binding: Paperback
• Number of pages: 158