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 regenerate the absorbent. Last previous edition approved in as D — ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Only use material s with an assigned value and assigned uncertainty for sulfur.
ASTM D4239 – 17
Use at least three such reference materials, for each range of sulfur values to be tested. Weigh a mass of the sample to at least the nearest 1 mg and not exceeding the maximum mass of reference material s asgm for calibration.
This standard has been approved for use by agencies of the Department of Defense.
Precision and Bias Analyze a test portion of reference material s 7. 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. Unless otherwise indicated, it is e4239 that all reagents conform to the speci? Verify all regulators, lines, and valves are free of grease and oil. Calculation to Other Bases 9.
Use f4239 mass of material and the calibration procedure recommended by the apparatus manufacturer. Twelve laboratories participated in this study. The uncertainty expressed as the con? Current edition approved Feb. C, the sulfur and sulfur compounds contained in the sample are decomposed and oxidized almost exclusively to gaseous sulfur dioxide, SO2.
A number in parentheses indicates the year of last reapproval. During combustion at temperatures above ? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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. 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.
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
Energy is absorbed as the gas passes through the cell body in 3 Available from International Organization for Standardization ISO1, ch. Weigh dd4239 at least the nearest 1 mg and evenly spread the test portion of the reference material into the sample combustion boat 6.
Repeat all samples analyzed since the last successful calibration veri?
Your comments are invited either asfm revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Analyze the test samples using the apparatus conditions employed for calibration. Select one reference material containing at least as much sulfur as the highest level of sulfur expected. Supporting data have been? B Where X is the average of two single test results.
Total sulfur as sulfur dioxide is detected on a continuous basis. Warning—Tungsten Oxide is a strong oxidizing agent.
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. Moisture and particulates are removed from the combustion gas by? Permission rights to photocopy the standard may also be secured from the ASTM website www.
In addition, information for coke was calculated per E using 48 sets of data for 24 coke samples from a commercially available interlaboratory pro? Originally approved in The gas stream is passed through a cell in which sulfur dioxide is measured by an infrared IR absorption detector.
Sulfur is oxidized during the reaction of the sample and WO3. One cell is used as both a reference and a measurement chamber. Summary of Test Method 3. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If the value determined for each reference material employed for veri? It is normally heated electrically using resistance wire.