ASTM D4239 PDF

0 Comment

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.

Author: Brarr Moshicage
Country: Chad
Language: English (Spanish)
Genre: Medical
Published (Last): 21 January 2012
Pages: 237
PDF File Size: 5.88 Mb
ePub File Size: 3.23 Mb
ISBN: 842-4-97240-731-4
Downloads: 44202
Price: Free* [*Free Regsitration Required]
Uploader: Nihn

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

Analyze the test samples using the apparatus conditions employed for calibration. The remaining material can be used for instrument conditioning. This standard has been approved for use by agencies of the Department of Defense. If the value determined for each reference material employed for veri?

It 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.

Energy is absorbed as the gas passes through the cell body in which the IR energy is being transmitted: Do not use the reference material for calibration or calibration veri?

Supporting data have been? One cell is used as both a reference and a measurement chamber. Weigh a mass of the sample to at least the nearest 1 mg and not exceeding the maximum mass of reference material s used for calibration. Permission rights to photocopy the standard may also be secured from the ASTM website www. Moisture and particulates are removed from the gas by? Do not regenerate the absorbent. All other IR energy is eliminated from reaching the detector by a precise wavelength?

  ABL80 FLEX PDF

During combustion at temperatures above ? Use a mass of material and the calibration procedure recommended by the apparatus manufacturer. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The gas stream is then passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector. The uncertainty expressed as the con?

The cokes used in this study included furnace coke, foundry coke and coke breeze. 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.

Last previous edition approved in as D — Summary of Test Method 3. Calculation to Other Bases 9.

In addition, information for coke was calculated per E using 48 sets of data for 24 coke samples from a commercially available interlaboratory pro? Select two additional reference materials, one approximately at the mid-point of the range and one below the lowest level of sulfur expected. Details and supporting information are given in Research Report RR: It is normally heated electrically using resistance aastm, a resistance wire, or molybdenum disilicide elements.

Originally approved in Use a material with a sulfur value near the mid point of the expected calibration range. 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 asfm gas passes through the cell body in 3 Available from International Organization for Standardization ISO1, ch.

  ECO401 HANDOUTS PDF

C, the sulfur and sulfur compounds contained in the sample are decomposed and oxidized almost exclusively to gaseous sulfur dioxide, SO2. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you ashm attend. Analyze a test portion of reference material s 7. A number in parentheses indicates the year of last reapproval.

Warning—Pure oxygen vigorously accelerates combustion. The gas stream is passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector.

ASTM D4239 – 17

Current edition approved Feb. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

Total sulfur as ast dioxide is detected on a continuous basis. If the analysis time exceeds the maximum analysis time recommended by the manufacturer take corrective action as recommended by the manufacturer. Use at least three such reference materials, for each range of sulfur values to be tested.

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

Verify the instrument calibration prior to analyzing test samples, upon completion of all test samples and as needed to meet quality control requirements. Use a mass that does not exceed aetm maximum mass used for instrument calibration and with a sulfur value within the range of the instrument calibration.

Moisture and particulates are removed from the combustion gas by? Only use material s with an assigned value and assigned uncertainty for sulfur. Axtm is normally heated electrically using resistance wire.

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. Precision and Bias