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

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For the values marked with an F, the available data was for a concentration greater than ten times but less than times the expected detection limit. In either case, standardization requires only two or three minutes and can be repeated easily if there is reason to suspect signicant drift. This may result in a drop in the intensity of the aluminum internal standard below its normal level, and a corresponding increase in the intensity ratios for the analytical lines.

The range shown for each element does not demonstrate the actual usable analytical range for that element. To demonstrate compliance with legislated Hg content limits, use of an alternate method capable of analysis with a minimum reporting limit of 0. Specific safety and health statements are given in Section Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

Refer to Practice E Optimum results are obtained by using as an internal standard a background channel proled off the peak of phosphorous A in the rst order.

ASTM E铝和铝合金分析_百度文库

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. Your comments are invited either for revision of e125 standard or for additional standards and should be addressed to ASTM Headquarters. If you feel that your comments have not received a fair hearing you should make your views ee1251 to the ASTM Committee on Standards, at the address shown below.

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The system shall include: In alloys that are noted for segregation, as many as ve burns may be needed. Therefore, the instrument shall be normalized as needed while the calibration data are being generated see Appendix X1. Usually a single high-purity reference material suffices to standardize the low ends of the curves for all elements.

Link to Active This link will asmt route to the current Active version of the standard. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

The specimen serves as one electrode, the cathode. C Second e2151 indicates that the second order shall be used, zstm available. The rst two are used primarily for relatively simple analytical programs, covering only a few alloy types.

The counter electrode is not attacked, and can be used for analyzing many specimens. The concentration ranges given in satm above scope were established through cooperative testing ILS of selected reference materials.

ASTM E1251 – 17a

F See footnote E. Precision and Bias 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 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. NOTE 4—The background equivalents and detection limits listed in Table 1 can be attained with a reciprocal linear dispersion of 5.

Note 5 NOTE 5—The gain and zero controls can be omitted if the analytical program is restricted to a few alloy types, the concentration ranges in each are restricted, and the gain and background levels do not vary widely from day to day. The range shown for each element does not demonstrate the actual usable analytical range for that element.

Typical time ranges are: Calibration may require only 5 to 20 calibrants. 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 astk factors in accordance with Ashm E Usually, the background readings of a spectrometer remain relatively constant.

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I The detection limit for iron is determined more by possible segregation in the specimen and by contamination during machining than by spectrochemical sensitivity. Refer to Practices E and E for guidance. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

Use one of the sets of electrical parameters given in Table 2. These have been found to give comparable analytical performance. The mass fraction ranges given in the above scope were established through cooperative testing ILS of selected reference materials. Argon also may be introduced around the counter electrode, but the ow rate shall not conne the discharge to an area less than 5 mm in diameter, to provide adequate sampling of the specimen.

Historical Version s – view previous versions of standard. Mercury Hg is intentionally not included in the scope. Normalize for any element that has shown a drift greater than 2s as measured in Note 18or for any element not covered by the rst normalization.

A few benchmark Certied Reference Materials are available from the National Institute of Standards and Technology5 and many other reference materials are available commercially in both chill-cast and wrought forms. In computer applications, correction is done mathematically by applying a slope and intercept correction, that is, a multiplication to correct the amount of difference between the high and low standardant readings followed by the addition or subtraction of a constant to nally restore readings to expected values.