ASTM C562-23

Standard Test Method for Moisture in a Graphite Sample

SIGNIFICANCE AND USE
4.1 This test method is applicable only for determination of the volatile moisture content resulting from adsorption of water vapor from the atmosphere, and is not intended to give representative moisture data for graphite that has been exposed to liquid water contamination.
SCOPE
1.1 This test method provides a practical determination for the percentage of moisture 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

• Status: Published
• Publication Date: 28-Feb-2023
• 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

• Refers: ASTM D4175-23a - Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
• Effective Date: 15-Dec-2023
• Refers: ASTM D4175-23e1 - Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
• Effective Date: 01-Jul-2023
• Refers: ASTM C561-91(2010)e1 - Standard Test Method for Ash in a Graphite Sample
• Effective Date: 01-May-2010
• Refers: ASTM C561-91(2005) - Standard Test Method for Ash in a Graphite Sample
• Effective Date: 01-Jun-2005
• Refers: ASTM C561-91(2000) - Standard Test Method for Ash in a Graphite Sample
• Effective Date: 10-Apr-2000

Overview

ASTM C562-23, Standard Test Method for Moisture in a Graphite Sample, is an established procedure developed by ASTM International for determining the volatile moisture content in graphite samples. This method is specifically designed to identify and quantify the moisture resulting from the adsorption of atmospheric water vapor. It is not intended for situations where graphite has been directly exposed to liquid water contamination.

This standard is widely recognized across industries for its reliability and repeatability when evaluating the moisture characteristics of graphite materials, ensuring compliance and consistency in quality control, production, and research applications.

Key Topics

• Purpose and Scope

  • Measures volatile moisture in graphite samples due to atmospheric vapor adsorption.
  • Not suitable for samples contaminated by direct liquid water exposure.
  • Uses SI units exclusively for all measurements and results.

• Test Method Summary

  • Involves precise weighing, drying, and weighing again to calculate moisture by weight.
  • Utilizes equipment such as alumina ceramics/platinum crucibles, analytical balances, drying ovens, and desiccators.
  • Sampling can be done with solid or particulate graphite, with provisions for minimal contamination during sample preparation.

• Interferences

  • Results may vary due to the type and condition of desiccants, relative humidity, sample handling, and graphite adsorptivity.
  • Careful attention to transfer timing and controlled environment is essential for accurate outcomes.

• Precision

  • Interlaboratory studies confirm consistent and reproducible results for similarly prepared samples.
  • The method has demonstrated a typical mean moisture content and low standard deviation, emphasizing reliability in industrial laboratories.

Applications

ASTM C562-23 is extensively used in the following areas:

• Quality Control: Verification of moisture content in graphite products prior to manufacturing or processing to maintain product integrity and performance.
• Material Evaluation: Supporting research and development teams in assessing storage and environmental effects on graphite, especially for high-purity applications.
• Industrial Carbon Production: Conforming to industry standards for graphite electrodes and refractory products, where moisture levels impact electrical and thermal properties.
• Compliance and Certification: Providing a standardized approach for supplier and customer agreements, especially in international trade and regulatory compliance.

Practical use of this standard supports consistent evaluation and reporting, reducing variability and ensuring that graphite materials meet stringent specifications.

Related Standards

For those implementing ASTM C562-23, the following standards may also be relevant:

• ASTM C561 - Test Method for Ash in a Graphite Sample: Used for determining ash content, an important parameter often examined alongside moisture.
• ASTM D4175 - Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants: Provides standardized terminology referenced in moisture determination and reporting.
• ASTM International Standards on Carbon and Graphite Products: Additional procedures for density, purity, and physical property assessments.

Keywords: ASTM C562-23, graphite moisture content, volatile moisture in graphite, standard test method, atmospheric water vapor adsorption, graphite quality control, material evaluation, ASTM graphite standards.

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: C562 − 23
Standard Test Method for
Moisture in a Graphite Sample
This standard is issued under the fixed designation C562; 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
1.1 This test method provides a practical determination for 4.1 This test method is applicable only for determination of
the percentage of moisture in a graphite sample. the volatile moisture content resulting from adsorption of water
vapor from the atmosphere, and is not intended to give
1.2 The values stated in SI units are to be regarded as
representative moisture data for graphite that has been exposed
standard. No other units of measurement are included in this
to liquid water contamination.
standard.
1.3 This standard does not purport to address all of the
5. Interferences
safety concerns, if any, associated with its use. It is the
5.1 Final weights (and therefore percent moisture values)
responsibility of the user of this standard to establish appro-
may be influenced by the following:
priate safety, health, and environmental practices and deter-
5.1.1 Type and condition of desiccant.
mine the applicability of regulatory limitations prior to use.
5.1.2 Ambient relative humidity at the time of the test.
1.4 This international standard was developed in accor-
5.1.3 Timing and procedure for moving samples from des-
dance with internationally recognized principles on standard-
iccator to the balance.
ization established in the Decision on Principles for the
5.1.4 Adsorptivity of the graphite sample relative to the
Development of International Standards, Guides and Recom-
adsorptivity of the desiccant used.
mendations issued by the World Trade Organization Technical
5.1.5 Residency time in the desiccator.
Barriers to Trade (TBT) Committee.
6. Apparatus
2. Referenced Documents
6.1 Alumina Ceramic or Platinum Crucible or Dish, suit-
2.1 ASTM Standards:
able for holding sample (subsequently called sample holder).
C561 Test Method for Ash in a Graphite Sample
6.2 Analytical Balance, capable of weighing to 60.0002 g.
D4175 Terminology Relating to Petroleum Products, Liquid
6.3 Drying Oven, air convection type, capable of being
Fuels, and Lubricants
controlled to 110 °C 6 2 °C.
3. Terminology
6.4 Desiccator, charged with indicating desiccant.
3.1 Definitions:
7. Sampling
3.1.1 For definitions of terms used in this test method, refer
7.1 Samples may be solid or particulate. Solid bodies may
to Terminology D4175.
3.1.2 moisture content, n—percentage content by weight of be sampled by removing one or more solid pieces from the
body by, for example, sawing, turning, milling, or fracturing.
volatile moisture present in the graphite specimen that has been
exposed to ambient conditions. Particulate samples may be generated from solid bodies by
drilling, using a carbide drill to minimize contamination, or by
other crushing and grinding methods.
This test method is under the jurisdiction of ASTM Committee D02 on
8. Procedure
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
8.1 Tare a dried sample holder using an analytical balance.
Current edition approved March 1, 2023. Published March 2023. Originally
Weigh a 25 g to 50 g sample into the tared sample holder and
approved in 1965. Last previous edition approved in 2015 as C562 – 15. DOI:
reweigh both. (Perform all weighings to a precision of
10.1520/C0562-23.
For referenced ASTM standa
...

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: C562 − 15 C562 − 23
Standard Test Method for
Moisture in a Graphite Sample
This standard is issued under the fixed designation C562; 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 percentage of moisture 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
2.1 ASTM Standards:
C561 Test Method for Ash 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 moisture content, n—percentage content by weight of volatile moisture present in the graphite specimen that has been
exposed to ambient conditions.
4. Significance and Use
4.1 This test method is applicable only for determination of the volatile moisture content resulting from adsorption of water vapor
from the atmosphere, and is not intended to give representative moisture data for graphite that has been exposed to liquid water
contamination.
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 Oct. 1, 2015March 1, 2023. Published November 2015March 2023. Originally approved in 1965. Last previous edition approved in 20102015
ɛ1
as C562 – 91C562 – 15.(2010) . DOI: 10.1520/C0562-15.10.1520/C0562-23.
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
C562 − 23
5. Interferences
5.1 Final weights (and therefore percent moisture values) may be influenced by the following:
5.1.1 Type and condition of desiccant.
5.1.2 Ambient relative humidity at the time of the test.
5.1.3 Timing and procedure for moving samples from desiccator to the balance.
5.1.4 Adsorptivity of the graphite sample relative to the adsorptivity of the desiccant used.
5.1.5 Residency time in the desiccator.
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 Drying Oven, air convection type, capable of being controlled to 110 °C 6 2 °C.
6.4 Desiccator, charged with indicating desiccant.
7. Sampling
7.1 Samples may be solid or particulat
...