Zobrazeno 1 - 10
of 22
pro vyhledávání: '"D. F. Siems"'
DETERMINATION OF THIRTY-TWO MAJOR AND TRACE ELEMENTS IN THREE NIST SOIL SRMS USING ICP-AES AND WDXRF
Publikováno v:
Geostandards and Geoanalytical Research. 18:85-89
The National Institute for Standards and Technology (NIST) has recently released three soil standard reference materials that are uncontaminated (SRM 2709), moderately contaminated (SRM 2711), and highly contaminated (SRM 2710) with metals. The SRMs
Publikováno v:
Geostandards and Geoanalytical Research. 16:45-54
Homogeneity studies on the geochemical exploration reference samples GXR-1 through GXR-6 were initially based on analyses by methods of 10–30 percent relative standard deviations (rsds). Use of the materials for high-precision method validation req
Autor:
M. J. Malcolm, D. F. Siems, J. Curry, Paul H. Briggs, J.S. Mee, Philip L. Hageman, Stephen A. Wilson
Publikováno v:
Open-File Report.
Publikováno v:
Open-File Report.
Autor:
B.M. Adrian, Q. Hennigh, G.A. Wandless, D. F. Siems, David L. Fey, Warren C. Day, Allen L. Meier, B.H. Roushey, Peter M. Theodorakos, R.L. Earhart, Paul H. Briggs, J.S. Mee
Publikováno v:
Open-File Report.
Publikováno v:
Economic Geology. 80:2196-2205
Samples of massive sulfide layers show an enrichment in many minor and trace elements in the central part of layers. Comparison of trace element contents of massive sulfides, magnetite, and disseminated sulfides suggests differences in origin. Trace
Publikováno v:
Open-File Report.
Publikováno v:
Open-File Report.