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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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A single burn frequently is employed for primary aluminum or for low-concentration alloys, where the specimens usually are homogeneous. Then some mechanism for single point standardization, such as a calculating board with movable concentration scales, may be used to compensate for instrumental drift.

ASTM E铝和铝合金分析_百度文库

The specimen shall seal the 8 to 15 mm opening in the top of the excitation chamber. Refer to Practices E s1251 E for r1251. NOTE 1—All-metal connections are required because the discharge is adversely affected asfm organic contamination, or by as little as r1251 ppm of oxygen or a few ppm of water vapor.

Standardization becomes a short and simple process. These have been found to give comparable analytical performance. This procedure employs calibration curves for each element that cover the entire concentration range that has to be determined in all alloys. The ow gage need not be incorporated in the system permanently, but may be connected at the outlet temporarily while initiating adjusting the operating ow, and then can be removed.

Link to Active This link will always route to the current Active version of the standard. 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. Then burn each calibrant four times. Other forms may be analyzed, provided that: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Active view current version of standard. Therefore, a blank standardant for an element e125 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.

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In routine use, f1251 a different alloy type has to be analyzed, a type reference material will be burned and d1251 computer will apply lateral shifts to the standardized curves, appropriate to each element sstm that alloy. All connections shall be leak-free. Calibration may require only 5 to 20 calibrants.

Such metals shall be trapped by bubbling the exhaust through water or a lter system, or the exhaust shall be vented to the atmosphere at a nonhazardous location. NOTE 4—The background equivalents and detection limits listed in Table 1 can be attained with a reciprocal linear dispersion of 5.

This, in turn, may produce concentration readings for silicon that are too high by 0. Accordingly, to correct for drift, it is essential to select prospective standardants and determine their uniformity before starting the calibration process.

ASTM E1251 – 17a

Cylinders of either compressed argon gas or liquid argon may be employed. F See footnote E. The ratios of the voltages of the analytical lines to the voltage of the internal standard line are converted into concentrations either manually by graphs, tables, or X-Y recorders, or by a computer in accordance with Practice E 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.

A good burn will have a deeply pitted area in the center, surrounded by a blackish ring, usually wider opposite the argon inlet. Mercury Hg is intentionally not included in the scope.

This standard is subject to revision at any e251 by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. The argon, with most of the metal dust, shall be exhausted to the atmosphere from the back or side of the chamber. For standardization, several reference materials e12551 employed to ensure that the high ends of each calibration curve will be returned to their original readings, and a single high-purity reference material is used to set the low ends of the curves.

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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 availability of appropriate reference materials.

Argon gas shall be introduced just inside the fused quartz window, owing toward the discharge, to prevent any of the metal powder produced at e11251 discharge from coating the inside of the window.

The excitation chamber shall be provided with a counter electrode holder and with a clamp to hold the specimen rmly against the upper plate. Last previous edition E — 88 e1.

If one or more of the e151 do not meet these criteria, this is an indication that they are not sufficiently homogeneous. 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.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

However, if at any time the gain adjustment of any channel drops below 0. Specific safety and health statements are given in Section The elements covered in the scope of this method are listed in the table below. Each matrix is calibrated as in X1. The copper tubing shall be kept as short as possible—preferably only a few feet. Draw the optimum theoretical analytical curve through the plotted points.

NOTE 9—For optimum precision and accuracy, the reference materials and specimens shall have been freshly machined no longer than 1 h before use, to avoid the formation of aluminum oxide. Equivalent accuracy can be obtained with each method, when properly employed.