ASTM E1251 PDF

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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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Link to Active This link will always route to the current Active version of the standard. NOTE asm direct-reading spectrometers should show little drift in the response of channels with time. The range shown for each astmm does not demonstrate the actual usable analytical range for that element.

Usually they have not yet become as stable as they will be after a month or so, and consequently, the readings obtained may show signicant drift.

ASTM E1251 – 17a

Inaccurate reporting of Hg due to these interference effects can jeopardize the current designation of aluminum production as a mercury-free process. F See footnote E.

The relative standard deviations of the internal standard intensities shall be less than 1. This procedure employs calibration curves for each element that cover the entire concentration range that has to be determined in all alloys. Accurate, high-speed analysis of aluminum, before it is poured from the furnace, can prevent scrapped heats and minimize the cost of expensive alloying metals.

Also, other sample forms can be melted and cast into a disk, using an appropriate mold, as described in Practices E X 5 the average of the individual measurements. Historical Version s – view previous versions of standard. A single standardant for each matrix is preferable, but several may be used.

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Inaccurate reporting of Hg due to these interference effects can jeopardize the current designation of aluminum production as a mercury-free process. The excitation chamber shall be designed so that it can be e11251 automatically with argon gas. Other forms may be analyzed, provided that: Usually the asmt standardant is a high reference material used to set the gain.

Signicance and Use 5.

E In this test method, the detection limit was measured by calculating the standard deviation of ten concentration printouts of a specimen between three and ten times the expected detection limit.

The data are based on ten successive readings. 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 e12251 of appropriate reference materials.

Mercury Hg is intentionally not included in the scope. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Therefore, a blank standardant for an element does not need to be used in routine standardization unless the lowest concentration that needs to be determined is within ten times the detection limit of that element.

Refer to Practices E and E for guidance. In alloys that are noted for segregation, as many as ve burns may be needed. The ow gage need not be incorporated in the system permanently, e12511 may be connected at the outlet temporarily while initiating adjusting the operating ow, and then can be removed.

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The exact composition need not be known, since the standardants shall be used only to adjust the instrument to reproduce the intensity ratios which they produced at the time the analytical curves were ee1251. The aluminum specimen to be analyzed may be in the form of a chill cast disk, casting, aztm, sheet, plate, extrusion or some other wrought form or shape. Precision and Bias 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.

ASTM E铝和铝合金分析_百度文库

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.

Precise and accurate analyses are essential to obtaining desired properties, meeting customer specifications, and helping to reduce scrap due to off-grade material. Standardization for each matrix is similar to that described in X1. The elements covered in the scope of this method are listed in the table below. 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 Calculate and enter appropriate correction factors in accordance with Practice E Other internal standard and analytical lines may be used, provided it is shown that the results obtained are comparable.