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

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.

The computer may have calculated a curve that weaves in and out between the points for the calibrants. Preparation of Reference Materials and Specimens Usually a single high-purity reference material suffices ashm standardize the low ends of the curves for all elements.

Calibration may require only 5 to 20 calibrants.

ASTM E1251 – 17a

Typical time ranges are: Summary of Test Method 4. To demonstrate compliance with legislated Hg content limits, use of an alternate method capable of analysis with a minimum reporting limit of 0. All connections shall be leak-free. The process of calibration will probably take several days.

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 e125 the time the analytical curves were established. Link to Active This link will always route to the current Active version of the standard.

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Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, astk entirely their own responsibility. The computer applies the displacement appropriate to that alloy over the relatively short portion of the overall calibration curve that will be used. Concentration or concentration ratio plots can be employed.

ASTM E铝和铝合金分析_百度文库

The elements covered in the scope of this method are listed in the table below. The specimen serves as one electrode, the cathode. The concentration ranges given in the above scope were established through cooperative testing ILS of selected reference materials. It can be applied to other types of specimens if there are appropriate reference materials, or if the specimens are remelted.

A single standardant is employed for each alloy type, with a composition near the normal or target concentrations for all elements. The rst two are used primarily for relatively simple analytical programs, covering only a few alloy types. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

The excitation chamber shall be enclosed and shall be provided with a safety interlock so that the source cannot be turned on until the door is closed. The range shown for each element does not demonstrate the actual usable analytical range for that element. Usually, the background readings of a spectrometer remain relatively constant. Suitable techniques include but are not limited to glow discharge mass spectrometry, XRF, and cold vapor AA.

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Note 1 The concentration ranges given in the above scope were established through cooperative testing ILS of selected reference materials. 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.

NOTE 12—Modern direct-reading spectrometers should show little drift in the response of channels with time. NOTE 17—Unfortunately, direct readers are usually calibrated shortly after they have been installed in the laboratory.

For each major alloy type, the calibration curves are adjusted by burning a type reference material in order atm obtain the correct concentrations for various alloys. See Appendix X1 for additional information concerning the acquisition of calibration data.

Procedure for Analyzing Specimens The unidirectional discharge does not attack the counter electrode, so that it can be used for many burns before renishing or replacement is necessary. The relative standard deviations of the internal standard intensities shall be less than 1.