ASTM D4239 PDF

ASTM D4239 PDF

By the Authority Vested By Part 5 of the United States Code § (a) and. Part 1 of the Code of Regulations § 51 the attached document has been duly. Buy ASTM D Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace. ASTM D Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High- Temperature Tube Furnace Combustion.

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Do not use the reference material for calibration or calibration veri? The cokes used in this study included furnace coke, foundry coke and coke breeze.

ASTM D4239 – 17

D42239 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. Analyze the test samples using the apparatus conditions employed for calibration 8.

Use a mass of material and the calibration procedure recommended by the apparatus manufacturer. Position the sample in the hot zone of the furnace until the instrument returns to baseline as indicated according to settings recommended by the manufacturer. Verify the instrument calibration prior to analyzing test samples, upon completion of all test samples and as needed axtm meet quality control requirements.

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Warning—Pure oxygen vigorously accelerates combustion. Do not allow contact with organic materials or reducing agents. Last previous edition approved in as D — Thus, the absorption of IR energy can be attributed only to sulfur dioxide whose concentration is proportional to the change in energy at the detector.

Energy is absorbed as the gas passes through the cell body in 3 Available from International Organization for Standardization ISO1, ch. Other materials that are coal awtm or coke s with documented traceability to reference material CRM coal s or coke s prepared by a national metrology body can also be used.

C, the sulfur and sulfur compounds contained in the sample d2439 decomposed and oxidized almost exclusively to gaseous sulfur dioxide, SO2.

Use a mass that does not exceed the maximum mass used for instrument calibration and with a sulfur atsm within the range of the instrument calibration.

Moisture and particulates are removed from the gas by? Analyze a test portion of reference material s 7. Calculation to Other Bases 9. The gas stream is then passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector.

One cell is used as both a reference and a measurement chamber.

Do not regenerate the absorbent. Use a material with a sulfur value near the ast point of the expected calibration astmm. Moisture and particulates are removed from the combustion gas by? A number in parentheses indicates the year of last reapproval. Select one reference material containing at least as much sulfur as the highest level of sulfur expected. Analyze the test samples using the apparatus conditions employed for calibration. Unless otherwise indicated, it is intended that all reagents conform to the speci?

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ASTM D高温燃烧方式测定煤及焦碳中硫含量的标准实验方法_百度文库

Twelve laboratories participated in this study. It is normally heated electrically using resistance rods, a resistance wire, or molybdenum disilicide elements.

Warning—Tungsten Oxide is a strong oxidizing agent. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Verify all regulators, lines, and valves are free of grease and oil. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on D42239, at the address shown below.

Details and supporting information are given in Research Report RR: Sulfur is oxidized during the reaction of the sample and WO3. D4293 standard has been approved for use by agencies of the Department of Defense.

Use at least three such reference materials, for each range of sulfur values to be tested.