Last edited by Vibar
Wednesday, May 6, 2020 | History

3 edition of Semiquantitative Spectrographic Analysis of Tungsten. found in the catalog.

Semiquantitative Spectrographic Analysis of Tungsten.

United States. Bureau of Mines.

Semiquantitative Spectrographic Analysis of Tungsten.

by United States. Bureau of Mines.

  • 161 Want to read
  • 5 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 5903
ContributionsPeterson, M.J., Chaney, C.L.
ID Numbers
Open LibraryOL21743339M

on ferberite and quartz. A semiquantitative spectrographic analysis showed the principal metal to be tungsten. Visually, *-ray powder films compare well with photographs of films of tungstic acid published by Morley () and Kerr and Young (). Although the agreement between measured r-ray data and values published by Kerr and Young. Mosier, E.L., , Use of emission spectroscopy for the semiquantitative analysis of trace elements in silver and native gold, in Ward, F.N., editor, New and refined methods of trace analysis useful in geochemical exploration: U.S. Geological Survey Bulletin , p.

S>The use of spectrographic standards of aluminum permits the rapid and nondestructive determination of Fe, Ni, Cu, Zn, Ga, V, Ti, Cr, and Mn in SAP with a detection sensitivity varying from 1 to 20 ppm, for a counting time of 64 seconds. Four samples with an amount of Al/sub 2/O/sub 3/ . Methods. The growth of tungsten oxide nanorods was conducted by heating a tungsten wire in an oxygen atmosphere inside an environmental TEM. The commercially obtained pure tungsten wire (wire diameter, 25 μm; purity, %; The Nilaco Corporation, Tokyo, Japan) was used as the primary material for the tungsten oxide nanorods, and the heater, for the wire-heated environmental TEM sample Cited by:

Introduction This method describes the sample collection and analysis of airborne tungsten (W) and cobalt (Co). Most industrial exposures to W also involve exposures to Co ().Tungsten carbide (WC or W 2 C) materials used for abrasives and cutting tools are frequently made containing Co metal which adheres to the surface of the hard but brittle tungsten carbide grains and cements them together. Tungsten is a steel-gray to tin-white metal. Impure tungsten metal is quite brittle, although pure tungsten can be cut with a saw, spun, drawn, forged, and extruded. Tungsten has the highest melting point and the lowest vapor pressure of the metals. At temperatures exceeding °C, it has .


Share this book
You might also like
NATIONSRENT, INC.

NATIONSRENT, INC.

A Guy and a Girl

A Guy and a Girl

The world of Winslow Homer, 1836-1910

The world of Winslow Homer, 1836-1910

The meaning of persons

The meaning of persons

Murder in the Hellfire Club

Murder in the Hellfire Club

What every American should know about whos really running America

What every American should know about whos really running America

Sri Lanka

Sri Lanka

Proceedings of the South Pacific Conference on National Parks and Reserves, 24-27 February, 1975, Wellington, New Zealand.

Proceedings of the South Pacific Conference on National Parks and Reserves, 24-27 February, 1975, Wellington, New Zealand.

Religious perplexities

Religious perplexities

The American bibliopolist ...

The American bibliopolist ...

Biological survey of North Branch Hammond River

Biological survey of North Branch Hammond River

Giotto

Giotto

Quiet beauty

Quiet beauty

Malaya

Malaya

Funtime With Turtles

Funtime With Turtles

Semiquantitative Spectrographic Analysis of Tungsten by United States. Bureau of Mines. Download PDF EPUB FB2

Semiquantitative spectrographic analysis of tungsten (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: Maurice Jarvis Peterson; C L Chaney; United States.

Bureau of Mines. For semiquantitative purpose a five minute grinding in a mortar was estim- ated to be sufficient and for quantitative analysis a time of ten minutes was used, the amount; of acetone being varied accordingly.

Spectrographic analysis of pure tungsten oxide by: Why does someone write a book about Tungsten. There are several reasons and precedents for this, the most important of which is that the last book on tungsten was written more than 20 years ago, inby St.

W H. Yih and Ch T. Wang. During the intervening period there have been many new scientific and technological developments and innova tions, so it was not only our opinion but the view /5(2).

Anal. Chem. All Publications/Website. OR SEARCH CITATIONSCited by: 9. Semiquantitative spectrographic analysis of tungsten / ([Washington, D.C.]: U.S.

Dept. of the Interior, Bureau of Mines, ), by Maurice Jarvis Peterson and C. Chaney (page images at HathiTrust). Line analysis of tungsten spectra has been done.

• Two Methods for evaluation of tungsten concentration based on the cooling rate of tungsten ions and the PEC of W42+ - W45+ ions are introduced with the required atomic data. • The Cw in steady-state H-mode discharge with RF heating is. Many of the basic analytical methods used for determining tungsten in biological media are also used for determining tungsten levels in environmental samples (e.g., soil, water, and air).

ICP-AES, ICP-MS, Flame AAS, UV/VIS spectrophotometry, and NAA are the most common techniques utilized for analysis of tungsten in environmental samples.

@article{osti_, title = {Chemical, mass spectrometric, spectrochemical, nuclear, and radiochemical analysis of uranium hexafluoride}, author = {}, abstractNote = {Analytical procedures, which are in routine use to determine conformance to uranium hexafluoride (UF/sub 6/) specifications in the Department of Energy gaseous diffusion plants or at other installations, are described in detail.

There are several reasons and precedents for this, the most important of which is that the last book on tungsten was written more than 20 years ago, inby St. W H. Yih and Ch T. Wang. During the intervening period there have been many new scientific and technological developments and innova­ tions, so it was not only our opinion but the.

Variation of the absorbance spectra of hypochlorous acid with perchlorate concentration. A hypochromic effect; Mechanistic Studies on Enzymatic Reactions by Electrospray Ionization MS Using a Capillary Mixer with Adjustable Reaction Chamber Volume for Time-Resolved Measurements.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Spectroscopic analysis of tungsten oxide thin films - Volume 25 Issue 12 - Felicia S. Manciu, Jose L. Enriquez, William G. Durrer, Young Yun, Chintalapalle V. Ramana, Satya K. GullapalliCited by: Tungsten values in stream water range over three orders of magnitude, from File Size: KB.

TABLE!.-Average abundance or range oftrace elements in the Earth's crust, various rocks, soil, and river water, and limits of determination for six-step ative emission spectrography and analytical methods of this compilation [Average abundance data from Levinson ().

All values in ppm, except river water in s(-), no data available]Cited by: The Horse Spring Formation of Miocene age in Clark County, Nevada, contains as much as % Li in individual samples.

Rock sequences which average % Li range from 3 m thick near Gold Butte (south of Mesquite, Nev.) to as much as 40 m thick near Lava Cited by: 5.

Semiquantitative spectrographic analysis for trace impurities indicatedgenerally. The quantitative analysis of tungsten ore using X-ray microCT: Case study Stephan G. Le Rouxa, Anton Du Plessisa,n, Abraham Rozendaalb a CT Scanner Facility, Stellenbosch University, Stellenbosch, South Africa b Earth Science Department, Stellenbosch University, Stellenbosch, South Africa article info Article history: Received 1 June Received in revised form.

A combined chemical and spectrographic method for the determination of traces of tungsten in rocks. Wilson, and M. Fieldes, Abstract. The first page of this article is displayed as the abstract. About. Cited by. Related Cited by: Heavy tungsten alloy powders with composition of 95W- NiFe, 93WNiFeCo, and 90W-6Ni-4Cu in wt% were prepared by chemical reduction and me- chanical alloying (MA) techniques.

Tungsten, iron, co- balt and nickel have been characterized in terms of flow rate, average grain sizes and apparent density. Table 1File Size: 3MB. POWDER METALLURGY COMPOSITES OF TUNGSTEN-BASE STRUCTURE AND PROPERTIES OF TUNGSTEN-BASE POW DER METALLURGY COMPOSITES all others by semiquantitative spectro- graphic analysis.

] Zlement)r com- I pound C N 0 Mg A1 Si Ca Ti Cr 1Mn Fe co Ni cu Zr Cb Mo Pd Ag Cd Sn Re Ta Pb W Tungsten ND NA~ I ND Bal. ND NA. Tungsten promotes papers globally to make scientific findings accessible to a broad range of readers. The following aspects related to tungsten and relative metals are of particular interest: Cross-disciplinary research in application of Tungsten and relative metals in functional materials, low-dimensional materials, 3D printing, energy.Tungsten, chemical element that is an exceptionally strong metal.

Occurrence, properties, and uses. The amount of tungsten in Earth’s crust is estimated to be parts per million, or about grams per ton of rock. China is the dominant producer of tungsten; in it produced over 80 percent of total tungsten mined, and it contained nearly two-thirds of the world’s reserves.

The determination of tungsten in low grade ores and geological samples is one of the most difficult and challenging tasks. Many of the associated elements, especially molybdenum interfere.

These have to be overcome by suitable methods of separation or suppression of the interfering elements. Since the concentrations are low, instrumental methods are preferred over the classical by: