ASTM E2008-17

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of the standard as published by ASTM is to be considered the official document.
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Designation: E2008 − 08 (Reapproved 2014) E2008 − 17
Standard Test Methods for
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Volatility Rate by Thermogravimetry
This standard is issued under the fixed designation E2008; 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.
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ε NOTE—Warning notes were editorially updated throughout in March 2014.
1. Scope
1.1 These test methods cover procedures for assessing the volatility of solids and liquids at given temperatures using
thermogravimetry under prescribed experimental conditions. Results of these test methods are obtained as volatility rates expressed
as mass per unit time. Rates ≥ 5 ≥5 μg/min are achievable with these test methods.
1.2 Temperatures typical for these test methods are within the range from 25°C to 500°C. This temperature range may differ
depending upon the instrumentation used.
1.3 These test methods are intended to provide a value for the volatility rate of a sample using a thermogravimetric analysis
measurement on a single representative specimen. It is the responsibility of the user of these test methods to determine the need
for and the number of repetitive measurements on fresh specimens necessary to satisfy end use requirements.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 There is no ISO method equivalent to this standard.
1.5 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 these test methods to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
1.6 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
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2.1 ASTM Standards:
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E473 Terminology Relating to Thermal Analysis and Rheology
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1142 Terminology Relating to Thermophysical Properties
E1582 Practice for Calibration of Temperature Scale for Thermogravimetry
E1860 Test Method for Elapsed Time Calibration of Thermal Analyzers
E2040 Test Method for Mass Scale Calibration of Thermogravimetric Analyzers
3. Terminology
3.1 Definitions:
3.1.1 The following terms are applicable to these test methods and can be found in Terminologies E473 and E1142:
3.1.1.1 thermogravimetric analysis (TGA),
3.1.1.2 thermogravimetry (TG), and
3.1.1.3 volatility.
3.2 Definitions of Terms Specific to This Standard:
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These test methods are under the jurisdiction of ASTM Committee E37 on Thermal Measurements and are the direct responsibility of Subcommittee E37.01 on
Calorimetry and Mass Loss.
Current edition approved March 15, 2014April 1, 2017. Published April 2014April 2017. Originally approved in 1999. Last previous edition approved in 20082014 as
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E2008 – 08.E2008 – 08 (2014) . DOI: 10.1520/E2008-08R14E01.10.1520/E2008-17.
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E2008 − 17
3.2.1 volatility rate—the rate of conversion of a solid or liquid substance into the vapor state at a given temperature; mass per
unit time.
4. Summary of Test Method
4.1 A solid or liquid specimen is confined in an appropriate container with a pinhole opening between 0.33 mm and 0.38 mm.
The confined specimen is heated within a thermogravimetric analyzer either to a temperature and held constant at that temperature
for a fixed interval of time (Method (Test Method A, Fig. 1) or at a slow constant heating rate between temperature limits (Method
(Test Method B, Fig. 2). The mass of the specimen is measured continuously and it or its ra
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