ASTM E2008-07

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E2008–07
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 ASTM Test Methods
E 473 Terminology Relating to Thermal Analysis and Rhe-
1.1 This test method covers procedures for assessing the
ology
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 SI units are the standard.
1.6 There is no ISO method equivalent to this standard.
4. Summary of Test Method
1.7 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
E 177 Practice for Use of the Terms Precision and Bias in
function of time or temperature. The volatility rate at any
temperature is reported either as the average rate of mass loss
per unit time from Method A or as the instantaneous rate of
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
mass loss (first derivative) per unit time from Method B.
Measurements and is the direct responsibility of Subcommittee E37.01 on Thermal
Test Methods and Practices.
5. Significance and Use
Current edition approved March 1, 2007 Published June 2007. Originally
approved in 1999. Last previous edition approved in 2006 as E 2008 – 06.
5.1 Volatility of a material is not an equilibrium thermody-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
namic property but is a characteristic of a material related to a
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
thermodynamic property that is vapor pressure. It is influenced
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 ----------------------
E2008–07
FIG. 1 Method A: R = Average Volatility Rate
v
FIG. 2 Method B: R = Instantaneous Volatility Rate
v
2

--------
...