ASTM E1251 PDF


E – 07 Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Atomic Emission Spectrometry, aluminum, aluminum alloys, atomic. Buy ASTM E TEST METHOD FOR ANALYSIS OF ALUMINUM AND ALUMINUM ALLOYS BY SPARK ATOMIC EMISSION. ASTM E Standard Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry Scope

Author: Vudonris Shaktijinn
Country: Slovenia
Language: English (Spanish)
Genre: Life
Published (Last): 10 March 2008
Pages: 219
PDF File Size: 11.89 Mb
ePub File Size: 8.39 Mb
ISBN: 520-2-16345-971-2
Downloads: 59355
Price: Free* [*Free Regsitration Required]
Uploader: Narisar

A superscript epsilon e indicates an editorial change since the last revision or reapproval. The specimen serves as one electrode, the cathode. A number in parentheses indicates the year of last reapproval. Burn the standardants for the next ve or six calibrants.

NOTE 13—Physically cleaning the counter electrode after each exposure, using a motor-driven wire brush, can prolong the time before a major cleaning or replacement is needed. A bad burn will have shallow pittings, surrounded by a whitish or silvery ring.

Other forms may be analyzed, provided that 1 they are sufficiently massive to prevent undue heating, 2 they permit machining at surfaces having a minimum diameter of approximately 15 mm, and 3 reference materials of similar metallurgical condition and chemical composition are available. NOTE 10—It is not within the scope of this test method to prescribe minute details relative to the preparation of the apparatus.

Adjust the counter electrode to provide an analytical gap of 3.

ASTM E铝和铝合金分析_百度文库

Different but simple curves covering a relatively short concentration range are used for each major alloy.

It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine s1251 applicability of regulatory limitations prior to use. The range shown for each element does not demonstrate the actual usable analytical range for that element.

  BRANDON BOYD WHITE FLUFFY CLOUDS PDF

In either case, standardization requires only two or three minutes and can be repeated easily if there is reason to suspect signicant drift. Reject all bad burns. If you feel that your comments have not received a fair hearing you should make your aztm known to the ASTM Committee on Standards, at the address shown below. This, in turn, may produce concentration readings for silicon that are too high by 0.

C Second 2nd indicates that the second order shall be used, where available. E will depend on the specic equipment, and a tradeoff that the individual laboratory selects between speed of analysis and slightly improved precision and accuracy with longer times.

The system also may contain the program circuitry that times the ush, pre-burn and exposure intervals, turns the source on and off, etc. Suitable techniques include but are not limited to glow discharge mass spectrometry, XRF, and cold vapor AA. NOTE 1—All-metal connections are required because the discharge is adversely affected by organic contamination, or by as little as 2 ppm of oxygen or a few ppm of water vapor.

The aluminum specimen to be analyzed may be in the form of a chill cast disk, casting, foil, sheet, plate, extrusion, or some other wrought form or shape. An Angstrom is dened as 0. Use only one type of counter electrode for measurements on all reference materials and specimens.

Cylinders of either compressed argon gas or liquid argon may be employed. Argon gas shall be introduced just inside the fused quartz window, owing toward the discharge, to prevent any of the metal powder produced at the discharge from coating the inside of the window. Also, other sample forms can be melted and cast into a disk, using an appropriate mold, as described in Practices E The aluminum specimen to be analyzed may be in the form of a chill cast disk, casting, foil, sheet, plate, extrusion, or some other wrought form or shape.

  DECRETO 4050 DIAN PDF

Flush period, s Preburn period, s Exposure period, s 2 to 7 2 to 10 5 to 20 For specimens with such low concentrations, single point standardization, either with the blank or another specimen, may give more consistent results. If the computer has a graphics feature, use it to plot the curve it has calculated; otherwise, plot manually the curves the computer has calculated to ensure that they are theoretically correct.

Calculate and enter appropriate correction factors in accordance with Practice E Each high-frequency wave train is fully rectied, so that the specimen is always the cathode, and only specimen material is introduced into the analytical gap.

ASTM E1251 – 17a

For unknown specimens where usually two burns are used, this means at least four burns of the standardants. Usually ten matrices will encompass all the present commercial aluminum alloys, organized so that one or two standardants asfm sufficient for each of the matrices described in X1.

The mass fraction ranges given in the above scope were established through cooperative testing ILS of selected reference materials.

Mount the counter electrode opposite the specimen. The usable analytical range may be extended higher or lower based on individual instrument capability, spectral characteristics of the specific element wavelength being used, and the availability of appropriate reference materials.

The data are based on ten successive readings.

Link to Active This link will always route to the current Active version of the standard. The counter electrode is not attacked, and can be used for analyzing many specimens. Refer to Practices E and E for guidance.