ASTM C561-23
(Test Method)Standard Test Method for Ash in a Graphite Sample
Standard Test Method for Ash in a Graphite Sample
SIGNIFICANCE AND USE
4.1 This test method provides a practical estimate of nonburnable residues in commercially available graphite materials. The ash values determined by this test method are of use in comparing the relative purity of various grades of graphite. To facilitate use, this test method institutes simplifications that preclude the ability to determine absolutely the ash values of the test graphite material due to uncontrolled sources of trace contamination.
4.2 This test method is not intended for use in determining the ash content of purified graphites, for example, nuclear materials. The relationship between the mineral content of a graphite sample and the ash content of that sample is unknown and is not determined by the application of this test method.
SCOPE
1.1 This test method provides a practical determination for the ash content in a graphite sample.
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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C561 − 23
Standard Test Method for
1
Ash in a Graphite Sample
This standard is issued under the fixed designation C561; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 4. Significance and Use
4.1 This test method provides a practical estimate of non-
1.1 This test method provides a practical determination for
burnable residues in commercially available graphite materials.
the ash content in a graphite sample.
The ash values determined by this test method are of use in
1.2 The values stated in SI units are to be regarded as
comparing the relative purity of various grades of graphite. To
standard. No other units of measurement are included in this
facilitate use, this test method institutes simplifications that
standard.
preclude the ability to determine absolutely the ash values of
1.3 This standard does not purport to address all of the the test graphite material due to uncontrolled sources of trace
safety concerns, if any, associated with its use. It is the
contamination.
responsibility of the user of this standard to establish appro-
4.2 This test method is not intended for use in determining
priate safety, health, and environmental practices and deter-
the ash content of purified graphites, for example, nuclear
mine the applicability of regulatory limitations prior to use.
materials. The relationship between the mineral content of a
1.4 This international standard was developed in accor-
graphite sample and the ash content of that sample is unknown
dance with internationally recognized principles on standard-
and is not determined by the application of this test method.
ization established in the Decision on Principles for the
5. Interferences
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 5.1 Although permitted within the scope of this test method,
Barriers to Trade (TBT) Committee. the use of alumina ceramic crucibles may affect results due to
difficulties in obtaining repeatable or proper weights, or both,
because of (1) the hygroscopic nature of some ceramic
2. Referenced Documents
crucibles, and (2) the possible chemical combination of trace
2
2.1 ASTM Standards:
elements with the ceramic crucible.
C562 Test Method for Moisture in a Graphite Sample
5.2 Any ash or trace elements introduced to the sample will
D4175 Terminology Relating to Petroleum Products, Liquid
influence results. Contamination can occur during drilling to
Fuels, and Lubricants
obtain the sample and during pulverization. (See 7.1.)
3. Terminology
6. Apparatus
3.1 Definitions:
6.1 Alumina Ceramic or Platinum Crucible or Dish, suit-
3.1.1 For definitions of terms used in this test method, refer
able for holding sample (subsequently called sample holder).
to Terminology D4175.
6.2 Analytical Balance, capable of weighing to 60.0002 g.
3.1.2 ash, n—in carbon and graphite technology, residue
6.3 Muffle Furnace, capable of reaching 950 °C with con-
remaining after oxidation of a carbon or graphite.
troller capable of maintaining a temperature of 950 °C 6
20 °C.
6.4 Platinum or Stainless Steel Wire.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
6.5 Desiccator, charged with indicating desiccant.
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
6.6 Drying Oven, air convection type, capable of being
Current edition approved March 1, 2023. Published March 2023. Originally
approved in 1965. Last previous edition approved in 2016 as C561 – 16. DOI:
controlled to 110 °C 6 2 °C.
10.1520/C0561-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7. Sampling
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 Samples may be solid or particulate. Solid bodies may
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. be sampled by removing one or more solid pieces from the
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C561 − 23
body by, for example, sawing, turning, milling, or fracturing. 9. Calculation
Par
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C561 − 16 C561 − 23
Standard Test Method for
1
Ash in a Graphite Sample
This standard is issued under the fixed designation C561; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This test method provides a practical determination for the ash content in a graphite sample.
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 appropriate safety and healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C562 Test Method for Moisture in a Graphite Sample
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology D4175.
3.1.2 ash, n—in carbon and graphite technology, residue remaining after oxidation of a carbon or graphite.
4. Significance and Use
4.1 This test method provides a practical estimate of nonburnable residues in commercially available graphite materials. The ash
values determined by this test method are of use in comparing the relative purity of various grades of graphite. To facilitate use,
this test method institutes simplifications that preclude the ability to determine absolutely the ash values of the test graphite
material due to uncontrolled sources of trace contamination.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved Jan. 1, 2016March 1, 2023. Published February 2016March 2023. Originally approved in 1965. Last previous edition approved in 20102016 as
ɛ1
C561 – 91 (2010)C561 – 16. . DOI: 10.1520/C0561-16.10.1520/C0561-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C561 − 23
4.2 This test method is not intended for use in determining the ash content of purified graphites, for example, nuclear materials.
The relationship between the mineral content of a graphite sample and the ash content of that sample is unknown and is not
determined by the application of this test method.
5. Interferences
5.1 Although permitted within the scope of this test method, the use of alumina ceramic crucibles may affect results due to
difficulties in obtaining repeatable or proper weights, or both, because of (1) the hygroscopic nature of some ceramic crucibles,
and (2) the possible chemical combination of trace elements with the ceramic crucible.
5.2 Any ash or trace elements introduced to the sample will influence results. Contamination can occur during drilling to obtain
the sample and during pulverization. (See 7.1.)
6. Apparatus
6.1 Alumina Ceramic or Platinum Crucible or Dish, suitable for holding sample (subsequently called sample holder).
6.2 Analytical Balance, capable of weighing to 60.0002 g.
6.3 Muffle Furnace, capable of reaching 950 °C with controller capable of maintaining a temperature of 950 °C 6 20 °C.
6.4 Platinum or Stainless Steel Wire.
6.5 Desiccator, charged with indicating desiccant.
6.6 Drying Oven, air convection type, capable of being controlled to 110 °C 6 2 °C.
7. Sampl
...
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