ASTM E1131-03

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:E1131–03
Standard Test Method for
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Compositional Analysis by Thermogravimetry
This standard is issued under the fixed designation E 1131; 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.
1. Scope E 1582 Practice for Calibration of Temperature Scale for
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Thermogravimetry
1.1 This test method provides a general technique incorpo-
E 2040 Test Method for Mass Scale Calibration of Thermo-
rating thermogravimetry to determine the amount of highly
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gravimetric Analyzers
volatile matter, medium volatile matter, combustible material,
2.2 ISO Standard:
and ash content of compounds. This test method will be useful
11358 Plastics-Thermogravimetry (TG) of Polymers —
in performing a compositional analysis in cases where agreed
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General Principles
upon by interested parties.
1.2 This test method is applicable to solids and liquids.
3. Terminology
1.3 Thetemperaturerangeoftestistypicallyroomtempera-
3.1 Definitions:
ture to 1000°C. Composition between 1 and 100 weight % of
3.1.1 Many of the technical terms used in this test method
individual components may be determined.
are defined in Terminologies E 473 and E 1142.
1.4 This test method utilizes an inert and reactive gas
3.2 Definitions of Terms Specific to This Standard:
environment.
3.2.1 highly volatile matter—moisture, plasticizer, residual
1.5 Computer or electronic-based instruments, techniques,
solvent or other low boiling (200°C or less) components.
or data treatment equivalent to this test method may also be
3.2.2 medium volatile matter—medium volatility materials
used.
such as oil and polymer degradation products. In general, these
NOTE 1—Users of this test method are expressly advised that all such
materials degrade or volatilize in the temperature range 200 to
instruments or techniques may not be equivalent. It is the responsibility of
750°C.
the user of this test method to determine the necessary equivalency prior
3.2.3 combustible material—oxidizable material not vola-
to use.
tile (in the unoxidized form) at 750°C, or some stipulated
1.6 SI units are the standard.
temperature dependent on material. Carbon is an example of
1.7 This standard is related ISO 11358 but is more detailed
such a material.
and specific.
3.2.4 ash—nonvolatile residues in an oxidizing atmosphere
1.8 This standard does not purport to address all of the
which may include metal components, filler content or inert
safety concerns, if any, associated with its use. It is the
reinforcing materials.
responsibility of the user of this standard to establish appro-
3.2.5 mass loss plateau—a region of a thermogravimetric
priate safety and health practices and determine the applica-
curve with a relatively constant mass.
bility of regulatory limitations prior to use.
4. Summary of Test Method
2. Referenced Documents
4.1 This test method is an empirical technique using ther-
2.1 ASTM Standards:
mogravimetry in which the mass of a substance, heated at a
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D 3172 Practice for Proximate Analysis of Coal and Coke
controlled rate in an appropriate environment, is recorded as a
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E 473 Terminology Relating to Thermal Analysis
function of time or temperature. Mass loss over specific
E 691 Practice for Conducting an Interlaboratory Study to
temperature ranges and in a specific atmosphere provide a
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Determine the Precision of a Test Method
compositional analysis of that substance.
E 1142 Terminology Relating to Thermophysical Proper-
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ties 5. Significance and Use
5.1 This test method is intended for use in quality control,
material screening, and related problem solving where a
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ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
Measurements and is the direct responsibility of Subcommittee E37.01 on Thermal
Analysis Methods.
Current edition approved March 10, 2003. Published April 2003. Originally
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approved in 1986. Last previous edition approved in 1998 as E 1131 – 98. Available from American National Standards Institute, 11 W. 42nd St., 13th
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Annual Book of ASTM Standards, Vol 05.05. Floor, New York, NY 10036.
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Annual Book of ASTM Standards, Vol 14.02. Supporting data available from ASTM. Request RR: 1009.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1131–03
compositional analysis is desired or a comparison can be made toprovideanindicationofthespecimen/furnacetemperatureto
with a known material of the same type. 61°C; (c) an electrobalance to continuously measure the
5.2 The parameters described should be considered as specimen mass with
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