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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This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Precision and Bias ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

It is normally heated electrically using resistance wire. Moisture and particulates are removed from the combustion gas by?

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

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.

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.

Total sulfur as sulfur dioxide is detected on a continuous basis. Repeat all samples analyzed since the last successful calibration veri? Select two additional reference materials, one approximately at the mid-point of the range d42239 one below the lowest level of sulfur expected.

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One cell is used as both a reference and a measurement chamber. A number in parentheses indicates the year of last reapproval. Originally approved in No other units of measurement are included in this standard. Sulfur 4d239 absorbs IR energy at a precise wavelength within the IR spectrum.

B Where X is the average of two single test results.

Weigh to at least the nearest 1 mg and evenly spread the test portion of the reference material into aatm sample combustion boat 6. Unless otherwise indicated, it is intended that all reagents conform to the speci?

Last previous edition approved in as D — The cokes used in this study included furnace coke, foundry coke and coke breeze. Details and supporting information are given in Research Report RR: Twelve laboratories participated in this study. Verify all regulators, lines, and valves are free of grease and oil. Do not regenerate the absorbent.

Only use material s with an assigned value and assigned uncertainty for sulfur. In addition, information for coke was calculated per E using 48 sets of data for 24 coke samples from a commercially available interlaboratory pro? Energy is absorbed as the gas passes through the cell body in 3 Available from International Organization for Standardization ISO1, ch.

Use a mass 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. Warning—Pure oxygen vigorously accelerates combustion. Do not allow contact with organic materials or reducing agents.

The gas stream is passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector. Verify the instrument calibration prior to analyzing test samples, upon completion of all test samples and as needed to meet quality control requirements.

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Supporting data have been? C, the sulfur and sulfur compounds contained in the sample are decomposed and oxidized almost exclusively to gaseous sulfur dioxide, SO2.

Use a mass of material and the calibration procedure recommended by the apparatus manufacturer. If the value determined for each reference material employed for veri?

Analyze a test portion of reference material s 7. The uncertainty expressed as the con? 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.

All other IR energy is eliminated from reaching the detector by a precise wavelength? Moisture and particulates are removed from the gas by? Use at least three such reference materials, for each range of sulfur values to be tested. The gas stream is then passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector.

ASTM D4239 – 17

It is normally heated electrically using resistance rods, a resistance wire, or molybdenum disilicide elements. Summary of Test Method 3. Weigh a mass of the sample to at least the nearest 1 mg and not exceeding d42339 maximum mass of reference material s used for calibration.