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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Moisture and particulates are removed from the gas by? Calculation to Other Bases 9. Analyze a test portion of reference material s 7. Atsm comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Supporting data d42239 been? Use a material with a sulfur value near the mid point of the expected calibration range. 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, are entirely their own responsibility.

Summary of Test Method 3. This standard has been approved for use by agencies of the Department of Defense. Last previous edition approved in as D — Other materials that are coal s or coke s with documented traceability to reference material CRM coal s or coke s prepared asm a national metrology body can also xstm used.

The gas stream is passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. A number in parentheses indicates the year of last reapproval. It is normally heated electrically using resistance wire. Total sulfur as sulfur dioxide is detected on a continuous basis. The gas stream is then passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector.

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Energy is absorbed as awtm gas passes through the cell body in which the IR energy is being transmitted: Moisture and particulates are removed from the combustion gas by? Select one f4239 material containing at least as much sulfur as the highest level of sulfur expected.

Repeat all samples analyzed since the last successful calibration veri? Do not allow contact with organic materials or reducing agents. B Where X is the average of two single test results. Use a d4293 that does not exceed the maximum mass used for instrument calibration and with a sulfur value within the range of the instrument calibration.

Current edition approved Feb.

Weigh a mass of asym sample to at least the nearest 1 mg and not exceeding the maximum mass of reference material s used for calibration. Energy is absorbed as the gas passes through the cell body in 3 Available from International Organization for Standardization ISO1, ch.

All other IR energy is eliminated from reaching the detector by a precise wavelength? Use at least three such reference materials, for each range asgm sulfur values to be tested. Unless otherwise indicated, it is intended that all reagents conform to the speci? Analyze the test samples using the apparatus conditions employed for calibration. Do not regenerate the absorbent. Select two additional reference materials, one approximately at the mid-point of the range and one below the lowest level of sulfur expected.

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If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

ASTM D4239 – 17

C, the sulfur and sulfur compounds contained in the sample are decomposed and oxidized almost exclusively to gaseous sulfur dioxide, SO2. Weigh to at least the nearest 1 mg and evenly spread the test portion of the reference material into the sample combustion boat 6.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? No other units of measurement are included in this standard.

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

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.

Permission rights to photocopy the standard may also be secured from the ASTM website www.

D239 is oxidized during the reaction of the sample and WO3. It is normally heated electrically using resistance rods, a resistance wire, or molybdenum disilicide elements. The uncertainty expressed as the con? During combustion at temperatures above ? One cell is used as both a reference and a measurement chamber.

Precision and Bias Use a mass of material and the calibration procedure recommended by the apparatus manufacturer. The remaining material can be used for instrument conditioning.

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