ASTM C561-16

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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2015
• ICS: 71.060.10 - Chemical elements
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.F0 - Manufactured Carbon and Graphite Products

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: C561 − 16
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* materials. The relationship between the mineral content of a
graphite sample and the ash content of that sample is unknown
1.1 This test method provides a practical determination for
and is not determined by the application of this test method.
the ash content in a graphite sample.
1.2 The values stated in SI units are to be regarded as
5. Interferences
standard. No other units of measurement are included in this
5.1 Although permitted within the scope of this test method,
standard.
the use of alumina ceramic crucibles may affect results due to
1.3 This standard does not purport to address all of the
difficulties in obtaining repeatable or proper weights, or both,
safety concerns, if any, associated with its use. It is the
because of (1) the hygroscopic nature of some ceramic
responsibility of the user of this standard to establish appro-
crucibles, and (2) the possible chemical combination of trace
priate safety and health practices and determine the applica-
elements with the ceramic crucible.
bility of regulatory limitations prior to use.
5.2 Any ash or trace elements introduced to the sample will
influence results. Contamination can occur during drilling to
2. Referenced Documents
obtain the sample and during pulverization. (See 7.1.)
2
2.1 ASTM Standards:
C562 Test Method for Moisture in a Graphite Sample
6. Apparatus
3. Terminology 6.1 Alumina Ceramic or Platinum Crucible or Dish, suit-
able for holding sample (subsequently called sample holder).
3.1 Definitions:
3.1.1 ash, n—in carbon and graphite technology, residue 6.2 Analytical Balance, capable of weighing to 60.0002 g.
remaining after oxidation of a carbon or graphite.
6.3 Muffle Furnace, capable of reaching 950 °C with con-
troller capable of maintaining a temperature of 950 °C 6
4. Significance and Use
20 °C.
4.1 This test method provides a practical estimate of non-
6.4 Platinum or Stainless Steel Wire.
burnable residues in commercially available graphite materials.
The ash values determined by this test method are of use in
6.5 Desiccator, charged with indicating desiccant.
comparing the relative purity of various grades of graphite. To
6.6 Drying Oven, air convection type, capable of being
facilitate use, this test method institutes simplifications that
controlled to 110 °C 6 2 °C.
preclude the ability to determine absolutely the ash values of
the test graphite material due to uncontrolled sources of trace
7. Sampling
contamination.
7.1 Samples may be solid or particulate. Solid bodies may
4.2 This test method is not intended for use in determining
be sampled by removing one or more solid pieces from the
the ash content of purified graphites, for example, nuclear
body by, for example, sawing, turning, milling, or fracturing.
Particulate samples may be generated from solid bodies by
1
drilling, using a carbide drill to minimize contamination, or by
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of other crushing and grinding methods.
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved Jan. 1, 2016. Published February 2016. Originally
8. Procedure
ɛ1
approved in 1965. Last previous edition approved in 2010 as C561 – 91 (2010) .
DOI: 10.1520/C0561-16.
8.1 Dry the sample in accordance with Test Method C562,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
or for a minimum of 16 h in a drying oven at 110 °C 6 2 °C,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
and allow the sample to cool to room temperature in the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. desiccator.
*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
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C561 − 16
8.2 Tare a dried sample holder using an analytical balance to
B = weight of the sample holder and dried sample,
60.002 g. As soon as the sample has cooled to room
C = weight of the sample holder and ash.
temperature, remove it from the desiccator and weigh a 25 g to
50 g sample into the tared sample holder
...

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.
´1
Designation: C561 − 91 (Reapproved 2010) C561 − 16 An American National Standard
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
ε NOTE—Updated units of measure throughout the standard editorially in May 2010.
1. Scope 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 health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C562 Test Method for Moisture in a Graphite Sample
3. Terminology
3.1 Definitions:
3.1.1 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.
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 6.17.1.)
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. 60.0002 g.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved May 1, 2010Jan. 1, 2016. Published May 2010February 2016. Originally approved in 1965. Last previous edition approved in 20052010 as
ɛ1
C561–91(2005).C561 – 91 (2010) . DOI: 10.1520/C0561-91R10E01.10.1520/C0561-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 − 16
6.3 Muffle Furnace, capable of reaching 950°C950 °C with controller capable of maintaining a temperature of 950°950 °C 6
20°C.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 110110 °C 6 2°C.2 °C.
7. Sampling
7.1 Samples may be solid or particulate. Solid bodies may be sampled by removing one or more solid pieces from the body by,
for example, sawing, turning, milling, or fracturing. Particulate samples may be generated from solid bodies by drilling, using a
carbide drill to minimize contamination, or by other crushing and grind
...