Share
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: Usg
H. K. Long
(Author)
·
J. W. Farrar
(Author)
·
Bibliogov
· Paperback
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: Usg - Long, H. K. ; Farrar, J. W.
Choose the list to add your product or create one New List
✓ Product added successfully to the Wishlist.
Go to My Wishlists
Origin: U.S.A.
(Import costs included in the price)
It will be shipped from our warehouse between
Friday, July 19 and
Friday, July 26.
You will receive it anywhere in United Kingdom between 1 and 3 business days after shipment.
Synopsis "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: Usg"
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.