ASTM C561-91(2000)

Standard Test Method for Ash in a Graphite Sample

SCOPE
1.1 This test method provides a practical determination for the ash content in a graphite sample.  
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. 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.

General Information

• Status: Historical
• Publication Date: 09-Apr-2000
• ICS: 71.060.10 - Chemical elements
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.F0 - Manufactured Carbon and Graphite Products

Relations

• Replaced By: ASTM C561-91(2005) - Standard Test Method for Ash in a Graphite Sample
• Effective Date: 01-Jun-2005
• Referred By: ASTM D7301-21 - Standard Specification for Nuclear Graphite Suitable for Components Subjected to Low Neutron Irradiation Dose
• Effective Date: 10-Apr-2000
• Referred By: ASTM C560-20 - Standard Test Methods for Chemical Analysis of Graphite
• Effective Date: 10-Apr-2000
• Referred By: ASTM F104-11(2020) - Standard Classification System for Nonmetallic Gasket Materials
• Effective Date: 10-Apr-2000
• Referred By: ASTM F2191/F2191M-13(2020)e1 - Standard Specification for Packing Material, Graphitic or Carbon Braided Yarn
• Effective Date: 10-Apr-2000
• Referred By: ASTM C562-23 - Standard Test Method for Moisture in a Graphite Sample
• Effective Date: 10-Apr-2000
• Referred By: ASTM F2168-13(2019) - Standard Specification for Packing Material, Graphitic, Corrugated Ribbon or Textured Tape, and Die-Formed Ring
• Effective Date: 10-Apr-2000
• Referred By: ASTM C1783-15 - Standard Guide for Development of Specifications for Fiber Reinforced Carbon-Carbon Composite Structures for Nuclear Applications
• Effective Date: 10-Apr-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation:C 561–91(Reapproved 2000)
Standard Test Method for
Ash in a Graphite Sample
This standard is issued under the fixed designation C 561; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4.2 Any ash or trace elements introduced to the sample will
influence results. Contamination can occur during drilling to
1.1 This test method provides a practical determination for
obtain the sample and during pulverization. (See 6.1.)
the ash content in a graphite sample.
1.2 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Alumina Ceramic or Platinum Crucible or Dish, suit-
responsibility of the user of this standard to establish appro-
able for holding sample (subsequently called sample holder).
priate safety and health practices and determine the applica-
5.2 Analytical Balance, capable of weighing to 60.0002 g.
bility of regulatory limitations prior to use.
5.3 Muffle Furnace, capable of reaching 950°C (1742°F)
2. Referenced Documents with controller capable of maintaining a temperature of 950° 6
20°C (1742 6 68°F).
2.1 ASTM Standards:
5.4 Platinum or Stainless Steel Wire.
C 562 Test Method for Moisture in a Graphite Sample
5.5 Desiccator, charged with indicating desiccant.
3. Significance and Use
5.6 Drying Oven, air convection type, capable of being
controlled to 110 6 2°C (230 6 4°F).
3.1 This test method provides a practical estimate of non-
burnableresiduesincommerciallyavailablegraphitematerials.
6. Sampling
The ash values determined by this test method are of use in
6.1 Samples may be solid or particulate. Solid bodies may
comparing the relative purity of various grades of graphite. To
be sampled by removing one or more solid pieces from the
facilitate use, this test method institutes simplifications that
body by, for example, sawing, turning, milling, or fracturing.
preclude the ability to determine absolutely the ash values of
Particulate samples may be generated from solid bodies by
the test graphite material due to uncontrolled sources of trace
drilling, using a carbide drill to minimize contamination, or by
contamination.
other crushing and grinding methods.
3.2 This test method is not intended for use in determining
the ash content of purified graphites, for example, nuclear
7. Procedure
materials. The relationship between the mineral content of a
7.1 Dry the sample in accordance with Test Method C 562,
graphite sample and the ash content of that sample is unknown
or for a minimum of 16 h in a drying oven at 110 6 2°C (230
and is not determined by the application of this test method.
6 4°F), and allow the sample to cool to room temperature in
4. Interferences the desiccator.
7.2 Tareadriedsampleholderusingananalyticalbalanceto
4.1 Although permitted within the scope of this test method,
60.002 g. As soon as the sample has cooled to room
the use of alumina ceramic crucibles may affect results due to
temperature, remove it from the desiccator and weigh a 25- to
difficulties in obtaining repeatable or proper weights, or both,
50-g sample into the tared sample holder. Reweigh the sample
because of ( a) the hygroscopic nature of some ceramic
and sample holder to 60.002 g.
crucibles, and ( b) the possible chemical combination of trace
7.3 Introduce a slow stream of air into the muffle furnace
elements with the ceramic crucible.
(Note 1). Place the sample holder containing the sample into
the furnace, then heat the furnace so that the sample reaches
This test method is under the jurisdiction of AS
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