Standards PDF Cover Page Document preview. Historical. ASTM E Standard Test ASTM International [ASTM]. Add to Alert; PDF. Add to Alert. ×. Buy ASTM E TEST METHOD FOR ANALYSIS OF ALUMINUM AND ALUMINUM ALLOYS BY SPARK ATOMIC EMISSION SPECTROMETRY from. Designation: E – 07 Standard Test Method for Analysis of Other forms 1 This test method is under the jurisdiction of ASTM . Arsenic Beryllium Bismuth Boron I II I .. The reader is referred to the manufacturer's manual that is supplied with the instrument.

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Astm E1251-11 Pdf Download

ASTM. E Standard Test Method for Analysis of Aluminum and Aluminum Alloys Active Standard ASTM E | Developed by Subcommittee: E TEL: , , Participant Instruction Sheet (Annexure: II) . ASTM E . Spectro Manual. Designation: E 07 Standard Test Method for Analysis of Aluminum and 66 Downloads . This test method is under the jurisdiction of ASTM Committee E01 on astm d astm dslt astm d astm d.

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Experiencias patrones de herencia mendeliana ratones y humanos. Apparatus 7. Chill cast samples, poured and cast as described within Practice E shall be the recommended form in this test method. A variable speed cutter, a cemented carbide or polycrystalline diamond tool bit, and an automatic cross-feed are highly recommended.

Proper depth of cut and desired surface? Second 2nd indicates that the second order shall be used, where available. Background Equivalent Concentration BEC —The concentration at which the signal due to the element is equal to the signal due to the background. In this test method, the calculated detection limit was measured by calculating the standard deviation of ten consecutive burns on a specimen with element concentration s at levels below ten times the expected detection limit.

D See footnote C. E High Concentration Index—The concentration at which the slope of the calibration curve drops below 0. F Interference Factor, k—The apparent increase in the concentration of the element being determined, expressed in percent, due to the presence of 1. G Useful analytical lines with improved signal to background ratios due to the complete removal of C-N background by the argon atmosphere. H If phosphorus is to be determined, the most sensitive line appears to be the The vacuum spectrometer should be operated at a pressure of 25 microtorr or less.

The gas?

Optimum results are obtained by using a background channel that has been pro? The ratio of P 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.

C duration , 3 an arc type discharge of some preset duration , and 4 a spark-type discharge, during which, time resolved measurements are made for improved detection limits, this may be optional on some instruments. It should be emphasized that the information presented is given as an example only and parameters may vary with respect to instrument model and manufacturer.

For details on describing and specifying an excitation source, please refer to Practice E The seal that is formed between the two will exclude atmospheric oxygen from entering the discharge chamber. The excitation chamber will contain a mounting clamp to hold the counter electrode.

The excitation stand assembly will also have some type of clamp or device designed to hold the sample?

ASTM-E, - terney.info

Some manufacturers may provide for the top plate to be liquid cooled to minimize sample heat-up during the excitation cycle. The excitation chamber will also be constructed so that it is? The excitation chamber will be equipped with an exhaust system that will safely dispose of the argon gas and the metal dust created during the excitation cycle.

For reasons of health and cleanliness, the exhausted gas and dust should not be vented directly into the laboratory. The exhaust can then be vented into an efficient hood system. The purity of the argon gas will affect the precision of the results.

ASTM E1251-07

Generally, precision improves as the purity of the argon gas gets higher. Argon gas with a minimum purity of The gas shall be delivered by a? The argon gas source can be from high-purity compressed gas cylinders, a cryogenic-type cylinder that contains liquid argon or possibly from a central supply liquid only. It is essential that only argon gas meeting the minimum purity of Delivery tubing must not produce any contamination of the argon stream.

Refrigerator grade copper tubing is recommended. The gages on the regulator will allow for the adjustment of the gas pressure to the instrument. Delivery pressure speci? Please note that the delivery tube connections should be made with all metal seals and the delivery tubing itself should be kept as short as possible Note 3.

Argon supply shall be sufficient to support required? All connections must be leak-free. NOTE 3—All metal connections are strongly recommended because the discharge is adversely affected by organic contamination, or by as little as 4 E — 07 2 ppm of oxygen or a few ppm of water vapor.

Data should be accessible to the operator throughout all steps of the calculation process. Concentration data may be automatically transferred to a site mainframe computer or server for further data storage and distribution. Materials 8.

The counter electrode should be made from thoriated tungsten or silver and have a pointed end. The gap distance between the specimen surface and the tip of the counter electrode is speci?

The diameter and geometry of the counter electrode is also application and vendor dependent. The counter electrode con? Electrode maintenance frequent brushing of the counter electrode to maintain its con?

It is recommended that the purchaser specify that the instrument come with several spare counter electrodes so that they can be replaced when necessary. Reference Materials 9. These materials should also possess a metallurgical condition that is similar to the material s that are being analyzed.

The calibrants shall be used to produce the analytical curves for the various elements being determined.

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The concentrations of these calibrants should be fairly evenly spaced over the calibrated analytical range so that a mathematically valid calibration curve can be established using all of the points.

Also, there are other commercial sources for aluminum reference materials. These reference materials can be used for establishing the analytical curve, but will not reveal potential interferences from nearby lines of other elements, or matrix effects that change instrument response or background. For optimum usefulness, several of the calibrants should have concentrations for the other elements that vary over the expected ranges in the specimen to be analyzed. NOTE 4—Atomic emission analysis is a comparative technique that requires a close match of the metallurgy, structure and composition between the reference material and the test material.

Differences in structure, such as result from the sodium modi? To ensure analytical accuracy, care must be taken to match the characteristics of the reference material to that of the test material or suitable corrections to adjust for these in? The low standardant is usually high purity smelter grade aluminum.

The high standardant s should have concentrations near or above the median concentration for the calibrated range of each spectral line. The commercially available standardants are tested for homogeneity and reproducibility of spectral response but are not necessarily certi?

Composition certi? Other forms may be analyzed, provided that: 1 they are sufficiently massive toprevent undue heating, 2 they allow machining to provide aclean, flat surface, which creates a seal between the specimenand the spark stand, and 3 reference materials of a similarmetallurgical condition and chemical composition are avail-able.

It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific safety andhealth statements are given in Section Referenced Documents2.

ASTM E 1251

Current edition approved June 1, Published June Originallyapproved in Last previous edition approved in as E The corrections are accom-plished mathematically and are applied to both the slope andintercept. Improved precision may be obtained by using amulti-point drift correction as described in Practice E Summary of Test Method4. The energy of the discharge is sufficient to ablate material fromthe surface of the sample, break the chemical or physicalbonds, and cause the resulting atoms or ions to emit radiantenergy.

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