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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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 specimen shall seal the 8 to 15 mm opening in the top of the excitation aztm. Each matrix is calibrated as in X1.

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. Draw the astn theoretical analytical curve through the plotted points. It can be applied to other types of specimens if there are appropriate reference materials, or if the specimens are remelted. The concentrations should be fairly evenly spaced over the anticipated analytical range, to establish a statistically sound smooth curve through all points.

ASTM E1251 – 17a

Historical Version s – view previous versions of standard. BoxEvergreen, CO NOTE 10—It is not within the scope of this test method to prescribe minute details relative to the preparation of the apparatus. The elements covered in the scope of this method are listed in the table below.

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Alternatively, it may be desirable to use separate standardization reference materials for each alloy type within the matrix. Two types of standardization are commonly used, as follows 3. If the analytical interest is just in low concentrations near the detection limit, a low standardant is used and either a gain or a background control may be adjusted. 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.

For each major alloy type, the calibration curves are adjusted by burning a type reference material in order to obtain the correct concentrations for various alloys. If a computer readout is available, read or print the concentrations directly. This procedure employs calibration curves for each element that cover the entire concentration range that has to be determined in all alloys.

ASTM E铝和铝合金分析_百度文库

The computer may have calculated a curve that weaves in and out between the points for the calibrants. The two procedures can give the same precision, accuracy, and detection limits. The concentration ranges given in the above scope were established through cooperative testing ILS of selected reference materials.

Refer to Practice E Usually the single standardant is a high reference material used to set the gain. The elements covered in the scope of this method are listed in the table below.

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A number in parentheses indicates the year of last reapproval. E — 94 Reapproved Standard Test Method for Optical Emission Spectrometric Analysis of Aluminum and Aluminum Alloys by the Argon Atmosphere, Point-to-Plane, Unipolar Self-Initiating E12251 Discharge1 This standard is issued under the xed designation E ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

Mercury Hg is intentionally not included in the scope. The relative standard deviations of the internal standard intensities shall be less than 1. These have been found to give comparable analytical performance. Calculate and enter appropriate correction factors in accordance with Practice E The mass fraction ranges given in the above scope were established through cooperative testing ILS of selected reference materials.

The wavelength coverage must include the analytical lines required for the needed concentration ranges, as listed in Table 1.

Preparation of Reference Materials and Specimens Procedure for Analyzing Specimens e251 For unknown specimens where usually two burns are used, this means at least four burns of the standardants. Accurate analysis of Hg using this technique is compromised by the presence of an intense iron interference. Manual adjustments are not needed during standardization because gain and background adjustment factors can be calculated automatically.