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ASTM E2008-04

(Test Method)

Standard Test Method for Volatility Rate by Thermogravimetry

Standard Test Method for Volatility Rate by Thermogravimetry

SCOPE
1.1 This test method covers procedures for assessing the volatility of solids and liquids at given temperatures using thermogravimetry under prescribed experimental conditions. Results of this test method are obtained as volatility rates expressed as mass per unit time. Rates 5 g/min are achievable with this test method.
1.2 Temperatures typical for this test method are within the range from 25°C to 500°C. This temperature range may differ depending upon the instrumentation used.
1.3 This test method is 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 this test method to determine the need for and the number of repetitive measurements on fresh specimens necessary to satisfy end use requirements.
1.4 Computer- or electronic-based instruments, techniques, or data treatment equivalent to this test method may also be used.Note 1
Users of this test method are expressly advised that all such instruments or techniques may not be equivalent. It is the responsibility of the user of this test method to determine the necessary equivalency prior to use.
1.5 The values stated in SI units are to be regarded as the standard.
1.6 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 test method to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Jan-2004
ICS
71.040.50 - Physicochemical methods of analysis
Technical Committee
E37 - Thermal Measurements
Drafting Committee
E37.01 - Calorimetry and Mass Loss
Current Stage
Ref Project

Relations

Replaces
ASTM E2008-99 - Standard Test Method for Volatility Rate by Thermogravimetry
Effective Date
01-Feb-2004
Replaced By
ASTM E2008-06 - Standard Test Method for Volatility Rate by Thermogravimetry
Effective Date
01-Mar-2006

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ASTM E2008-04 - Standard Test Method for Volatility Rate by ThermogravimetryASTM E2008-04 - Standard Test Method for Volatility Rate by Thermogravimetry
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ASTM E2008-04 - Standard Test Method for Volatility Rate by Thermogravimetry
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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:E2008–04
Standard Test Method for
1
Volatility Rate by Thermogravimetry
This standard is issued under the fixed designation E 2008; 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 177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
1.1 This test method covers procedures for assessing the
E 473 Terminology Related to Thermal Analysis
volatility of solids and liquids at given temperatures using
E 691 Practice for Conducting an Interlaboratory Study to
thermogravimetry under prescribed experimental conditions.
Determine the Precision of a Test Method
Results of this test method are obtained as volatility rates
E 1142 Terminology Relating toThermophysical Properties
expressed as mass per unit time. Rates $ 5 µg/min are
E 1582 Practice for Calibration of Temperature Scale for
achievable with this test method.
Thermogravimetry
1.2 Temperatures typical for this test method are within the
E 1860 Test Method for Elapsed Time Calibration of Ther-
range from 25°C to 500°C. This temperature range may differ
mal Analyzers
depending upon the instrumentation used.
E 2040 Test Method for Mass Scale Calibration of Thermo-
1.3 This test method is intended to provide a value for the
gravimetric Analyzers
volatility rate of a sample using a thermogravimetric analysis
measurement on a single representative specimen. It is the
3. Terminology
responsibility of the user of this test method to determine the
3.1 Definitions:
need for and the number of repetitive measurements on fresh
3.1.1 The following terms are applicable to this test method
specimens necessary to satisfy end use requirements.
and can be found in Terminologies E 473 and E 1142:
1.4 Computer- or electronic-based instruments, techniques,
3.1.1.1 thermogravimetric analysis (TGA),
or data treatment equivalent to this test method may also be
3.1.1.2 thermogravimetry (TG),
used.
3.1.1.3 volatility.
NOTE 1—Users of this test method are expressly advised that all such
3.2 Definitions of Terms Specific to This Standard:
instruments or techniques may not be equivalent. It is the responsibility of
3.2.1 volatility rate—the rate of conversion of a solid or
the user of this test method to determine the necessary equivalency prior
liquid substance into the vapor state at a given temperature;
to use.
mass per unit time.
1.5 The values stated in SI units are to be regarded as the
standard.
4. Summary of Test Method
1.6 This standard does not purport to address all of the
4.1 Asolid or liquid specimen is confined in an appropriate
safety concerns, if any, associated with its use. It is the
container with a pinhole opening between 0.33 and 0.38 mm.
responsibility of the user of this test method to establish
The confined specimen is heated within a thermogravimetric
appropriate safety and health practices and determine the
analyzer either to a temperature and held constant at that
applicability of regulatory limitations prior to use.
temperature for a fixed interval of time (Method A, Fig. 1) or
at a slow constant heating rate between temperature limits
2. Referenced Documents
(Method B, Fig. 2). The mass of the specimen is measured
2
2.1 ASTM Standards:
continuously and it or its rate of change is displayed as a
function of time or temperature. The volatility rate at any
temperature is reported either as the average rate of mass loss
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
per unit time from Method A or as the instantaneous rate of
Measurements and is the direct responsibility of Subcommittee E37.01 on Test
Methods and Recommended Practices.
mass loss (first derivative) per unit time from Method B.
Current edition approved Feb. 1, 2004. Published March 2004. Originally
approved in 1999. Last previous edition approved in 1999 as E 2008–99.
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
Standardsvolume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E2008–04
FIG. 1 Method A: R = Average Volatility Rate
v
5. Significance and Use Method A (see Fig. 3). In such cases the volatility rate is not
constant and shall not be reported as a singular value.
5.1 Volatility of a material is not an equilibrium thermody-
namic property but is a characteristic of a material related to a
7. Apparatus
thermodynamic property wh
...

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5.1 Volatility of a material is not an equilibrium thermodynamic property but is a characteristic of a material related to a thermodynamic property that is vapor pressure. It is influenced by such factors as surface area, temperature, particle size, and purge gas flow rate; that is, it is diffusion controlled.  
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