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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The range shown for each element does not demonstrate the actual usable analytical range for that element.

Link to Active This link will always route to the current Active version of the standard. I The detection limit for iron is determined more by possible segregation in the specimen and by contamination during machining than by spectrochemical sensitivity. An Angstrom is dened as 0.

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. Access to the power supply shall be permitted only by removing panels which contain safety interlocks or require the use of tools. A single standardant is employed for each alloy type, with a composition near the normal or target concentrations for all elements.

Astj Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

A good burn will have a deeply pitted area in the center, e1215 by a blackish ring, usually aztm opposite the argon inlet. NOTE 6—A magnesium furnace is not acceptable because it will introduce variable magnesium contamination. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

The concentration ranges given in the above scope were established e2151 cooperative testing ILS of selected reference materials.

With such a curve, seriously erroneous analyses may be obtained for unknown specimens with concentrations f1251 the calibrants. Manual adjustments are not needed during standardization because gain and background adjustment factors can be calculated automatically.

To demonstrate compliance with asttm Hg content limits, use of an alternate method capable of analysis with a minimum reporting limit of 0. This standard is subject to revision at any time by the responsible technical committee and must be reviewed zstm ve years and if not revised, either reapproved or withdrawn.

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NOTE 8—Reference materials and specimens modied with sodium may produce blacker burns with deeper penetration of the spark into the surface. A ow gage is required to check the ow rates. An alternative counter electrode, a 6. Active view current version of standard. BoxEvergreen, CO Repeat the process e12551 burning the standardants, normalizing where appropriate, and burning the next ve or six calibrants, until all calibrants have been burned.

Refer to Practice E Therefore, the instrument shall be adtm as needed while the calibration data are being generated see Appendix X1. NOTE 10—It is not within the scope of this test method to prescribe minute details relative to the preparation of the apparatus. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of astj limitations prior to use. The copper tubing shall be kept as short as possible—preferably only a few feet.

The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. In alloys that are noted for segregation, as many as ve burns may be needed. A number in parentheses indicates d1251 year of last reapproval. Even with this compensation for variability in background, alloys with highly different compositions of major alloying elements, particularly silicon, require separate reference materials and analytical curves.

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.

This keeps the system as simple as possible and eliminates a possible source of organic contaminants or leaks. Two separate matrices will be required if both the Series wrought alloys and Asmt casting alloys have to be analyzed. Historical Version s – view previous versions of 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.

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Preparation of Apparatus The measuring system may read only intensity ratios voltage e151which then have to be converted into concentrations manually, or the system may use a computer or programmable calculator to convert intensity ratios into concentrations.

The wavelength coverage must include the analytical lines required for the needed concentration ranges, as listed in Table 1. The computer applies the displacement appropriate to that alloy over the relatively short portion of the overall calibration curve that will be used.

Last previous edition E — 88 e1. The data are based on ten successive readings. C Second 2nd indicates that the second order shall be used, where available.

ASTM E1251 – 17a

NOTE 17—Unfortunately, direct readers are usually calibrated shortly after they have been installed in the laboratory. Inaccurate reporting of Hg due to these interference effects can jeopardize the current designation of aluminum production as a mercury-free process.

Two to four burns are recommended for most alloys, where homogeneity is fair and accuracy becomes important.

This standard does not purport to address all of the safety concerns, if any, associated with its use. Usually ten matrices will encompass all the present commercial aluminum alloys, organized so that one or two standardants are sufficient for each of the matrices described in X1.

However, it is employed here for the convenience of the users of this test method who may wish asttm refer to the wavelength tables which contain Angstrom units. The lines listed asm proven satisfactory for the elements and concentration ranges prescribed in the Scope.

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. For optimum usefulness, several of the calibrants should have concentrations of the other elements that cover the ranges to be expected in the unknown specimens.