Zobrazeno 1 - 10
of 12
pro vyhledávání: '"L A Machlan"'
Autor:
T. G. Dzubay, R. L. Walter, R. D. Willis, J. W. Gramlich, L. J. Moore, A. R. Stiles, E. L. Garner, R. M. Baum, L. A. Machlan
Publikováno v:
Advances in X-ray Analysis. 19:473-486
The purpose of this work was to develop accurate calibration standards which were fully characterized in terms of uniformity and concentration using fundamental measuring methods. Three similar sets of vacuum deposits were commercially made, each set
Publikováno v:
Clinical Chemistry. 28:1309-1313
Thermal-ionization isotope-dilution mass spectrometry is a highly precise and accurate method for the determination of potassium concentrations in serum. Although not suited for routine use because of the time and expense required, the technique prov
Publikováno v:
Journal of Research of the National Institute of Standards and Technology
Absolute values have been obtained for the isotopic abundance ratios of a reference sample of nickel (Standard Reference Material 986), using thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopical
Autor:
W. R. Shields, I. L. Barnes, Horace A. Bowman, Albert Henins, L. J. Moore, Randall M. Schoonover, C. L. Carroll, Richard D. Deslattes, L. A. Machlan
Publikováno v:
Physical Review Letters. 33:463-466
Measurements are reported on the densities and isotopic-abundance ratios of nearly perfect Si single crystals. These, when combined with optical interferometry of the crystal repeat distance, yield a new value for the Avogadro constant. This result,
Publikováno v:
Analytical Chemistry. 46:1082-1089
Autor:
Roy J. Knight, I. L. Barnes, E. L. Garner, J. W. Gramlich, Mitsunobu. Tatsumoto, T. J. Murphy, L. J. Moore, L. A. Machlan, W. R. Shields
Publikováno v:
Analytical Chemistry. 45:880-885
Publikováno v:
Clinical chemistry. 28(6)
Thermal-ionization isotope-dilution mass spectrometry is a highly precise and accurate method for the determination of potassium concentrations in serum. Although not suited for routine use because of the time and expense required, the technique prov
Publikováno v:
Medical times. 87
Publikováno v:
Journal of Research of the National Institute of Standards and Technology
Twenty-nine samples of high-purity nickel metals, reagent salts and minerals, collected from worldwide sources, have been examined by high-precision isotope ratio mass spectrometry for their nickel isotopic composition. These materials were compared