ASTM D5832-98(R2021) pdf free download

ASTM D5832-98(R2021) pdf free download.Standard Test Method for Volatile Matter Content of Activated Carbon Samples
1. Scope
1.1 This test method covers the determination of the per- centage of gaseous products, exclusive of moisture vapor, present in virgin and used activated carbons which are released under specific conditions of the test. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions—For definitions of terms used in this test method relating to activated carbon, refer to Terminology D2652.
4. Summary of Test Method
4.1 Volatile matter is determined by establishing the loss in mass resulting from heating an activated carbon sample under rigidly controlled conditions. The measured mass loss, cor- rected for moisture as determined in Test Method D2867, establishes the volatile matter content of the activated carbon sample.
5. Significance and Use
5.1 Volatile matter, when determined as herein described, may be used as a relative measure of the extent of carboniza- tion in an activated carbon and the extent of loading of volatile material on an activated carbon that has been used in an adsorption application. 5.2 Combined with other information, the volatile matter of an activated carbon may be useful in evaluating its perfor- mance in an adsorption application. 5.3 Other automated methods for the determination of the volatile content of solids, such as using a thermogravimetric analyzer (TGA), can be used in place of this test method with equally reliable results.
6. Apparatus
6.1 Crucible and Cover, high-temperature porcelain, high form, 30 cc capacity. 6.2 Oven, forced-air circulation, capable of temperature regulation up to 250 °C. 6.3 Moisture Determination Apparatus, as described in Test Method D2867. 6.4 Muffle Furnace, gravity circulation, capable of tempera- ture regulation at 950 6 25 °C. An electric furnace similar to the one described in Test Method D3175 is suitable for use in this test method. 6.5 Desiccator, glass, with indicating type desiccant. 6.6 Balance, analytical, capable of 0.1 mg sensitivity.
8. Procedure
8.1 Determine the moisture content of an as-received rep- resentative portion of the sample using the xylene extraction Test Method described in D2867. If the as-received sample is wet, drain it of all free liquid before the representative sample is taken. 8.2 Weigh to 0.1 mg accuracy a crucible and cover that have been ignited in a muffle furnace regulated at 950 °C for 30 min and cooled in a desiccator. Record the weight. 8.3 Using a spoon or spatula, dip from the sample bottle approximately 1 g of the as-received sample and place it in the pre-dried and tared crucible. Cover it with a lid and immedi- ately weigh it to the nearest 0.1 mg. 8.4 Place the covered crucible in the muffle furnace regu- lated at 950 6 25 °C for 7 min 6 10 s. 8.5 Remove the covered crucible from the muffle furnace and cool to room temperature in a desiccator. 8.6 Weigh the covered crucible to the nearest 0.1 mg. Record the weight.