ASTM E1782-22

Standard Test Method for Determining Vapor Pressure by Thermal Analysis

SIGNIFICANCE AND USE
5.1 Vapor pressure is a fundamental thermophysical property of a liquid. Vapor pressure data are useful in process design and control, in establishing environmental regulations for safe handling and transport, for estimation of volatile organic content (VOC), and in deriving hazard assessments. Vapor pressure and boiling temperature data are required for Safety Data Sheets (SDS). The enthalpy of vaporization may also be estimated from the slope of the vapor pressure curve (see Practice E2071).
SCOPE
1.1 This test method describes a procedure for the determination of the vapor pressure of pure liquids or melts from boiling point measurements made using differential thermal analysis (DTA) or differential scanning calorimetry (DSC) instrumentation operated at different applied pressures.  
1.2 This test method can be used for the temperature range 273 K to 773 K (0 °C to 500 °C) and for pressures between 0.2 kPa to 2 MPa. These ranges may differ depending upon the instrumentation used and the thermal stability of materials tested. Because a range of applied pressures is required by this test method, the analyst is best served by use of instrumentation referred to as high pressure differential thermal instrumentation (HPDSC or HPDTA).  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. (See also IEEE/ASTM SI 10.)  
1.4 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.  
1.5 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: 30-Jun-2022
• ICS: 17.200.10 - Heat. Calorimetry
• Technical Committee: E37 - Thermal Measurements
• Drafting Committee: E37.01 - Calorimetry and Mass Loss

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: E1782 − 22
Standard Test Method for
1
Determining Vapor Pressure by Thermal Analysis
This standard is issued under the fixed designation E1782; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E473Terminology Relating to Thermal Analysis and Rhe-
ology
1.1 This test method describes a procedure for the determi-
E691Practice for Conducting an Interlaboratory Study to
nation of the vapor pressure of pure liquids or melts from
Determine the Precision of a Test Method
boiling point measurements made using differential thermal
E967Test Method for Temperature Calibration of Differen-
analysis (DTA) or differential scanning calorimetry (DSC)
tial Scanning Calorimeters and Differential ThermalAna-
instrumentation operated at different applied pressures.
lyzers
1.2 This test method can be used for the temperature range
E1142Terminology Relating to Thermophysical Properties
273K to 773 K (0°C to 500°C) and for pressures between
E2071Practice for Calculating Heat of Vaporization or
0.2kPato2MPa.Theserangesmaydifferdependinguponthe
Sublimation from Vapor Pressure Data
instrumentation used and the thermal stability of materials
E3142Test Method for Thermal Lag of Thermal Analysis
tested. Because a range of applied pressures is required by this
Apparatus
test method, the analyst is best served by use of instrumenta-
IEEE/ASTM SI10Standard for Use of the International
tionreferredtoashighpressuredifferentialthermalinstrumen-
System of Units (SI) The Modern Metric System
tation (HPDSC or HPDTA).
3. Terminology
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3.1 Definitions:
standard. (See also IEEE/ASTM SI10.) 3.1.1 The following terms are applicable to this test method
and can be found in either Terminology E473 or Terminology
1.4 This standard does not purport to address all of the
E1142:boilingpressure,boilingtemperature,differentialscan-
safety concerns, if any, associated with its use. It is the
ning calorimetry (DSC), differential thermal analysis (DTA),
responsibility of the user of this standard to establish appro-
vapor pressure, vaporization point, vaporization temperature.
priate safety, health, and environmental practices and deter-
3.2 Symbols:
mine the applicability of regulatory limitations prior to use.
3
3.2.1 A, B, C—Antoine vapor pressure equation (1) con-
1.5 This international standard was developed in accor-
stants (log , kPa, K):
dance with internationally recognized principles on standard- 10
ization established in the Decision on Principles for the
Antoinevaporpressureequation:Log P 5 A 2 B/~T1C!
10
Development of International Standards, Guides and Recom-
where:
mendations issued by the World Trade Organization Technical
P = vapor pressure, kPa,
Barriers to Trade (TBT) Committee.
T = temperature, K, and
A, B, and C = constants.
2. Referenced Documents
2
2.1 ASTM Standards:
4. Summary of Test Method
E177Practice for Use of the Terms Precision and Bias in
4.1 In thermal analysis, a physical property of a material is
ASTM Test Methods
measured either as a function of time at a specified constant
temperature, or more frequently, as a function of temperature
1 under conditions of a fixed rate of temperature change. The
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
Measurements and is the direct responsibility of Subcommittee E37.01 on Calo- measured property is the dependent variable and the measured
rimetry and Mass Loss.
temperature is the independent variable. A specimen in an
Current edition approved July 1, 2022. Published August 2022. Originally
appropriate container is heated at a constant rate within a DTA
approved in 1996. Last previous edition approved in 2014 as E1782–14. DOI:
orDSCinstrumentoperatedunderanappliedconstantvacuum/
10.1520/E1782-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The boldface numbers in parentheses refer to a list of references at the end of
the ASTM website. this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1782 − 22
pressurebetween0.2kPaand2MPauntilaboilingendotherm
is recorded.
...

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: E1782 − 14 E1782 − 22
Standard Test Method for
1
Determining Vapor Pressure by Thermal Analysis
This standard is issued under the fixed designation E1782; 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.
1. Scope
1.1 This test method describes a procedure for the determination of the vapor pressure of pure liquids or melts from boiling point
measurements made using differential thermal analysis (DTA) or differential scanning calorimetry (DSC) instrumentation operated
at different applied pressures.
1.2 This test method maycan be used for the temperature range 273273 K to 773 K (0(0 °C to 500°C)500 °C) and for pressures
between 0.2 kPa 0.2 kPa to 2 MPa. These ranges may differ depending upon the instrumentation used and the thermal stability of
materials tested. Because a range of applied pressures is required by this test method, the analyst is best served by use of
instrumentation referred to as high pressure differential thermal instrumentation (HPDSC or HPDTA).
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. (See
also IEEE/ASTM SI 10.)
1.4 There is no ISO standard equivalent to this test method.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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
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
E967 Test Method for Temperature Calibration of Differential Scanning Calorimeters and Differential Thermal Analyzers
E1142 Terminology Relating to Thermophysical Properties
E2071 Practice for Calculating Heat of Vaporization or Sublimation from Vapor Pressure Data
E3142 Test Method for Thermal Lag of Thermal Analysis Apparatus
1
This test method is under the jurisdiction of ASTM Committee E37 on Thermal Measurements and is the direct responsibility of Subcommittee E37.01 on Calorimetry
and Mass Loss.
Current edition approved March 15, 2014July 1, 2022. Published April 2014August 2022. Originally approved in 1996. Last previous edition approved in 20082014 as
E1782 – 08.E1782 – 14. DOI: 10.1520/E1782-14.10.1520/E1782-22.
2
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1782 − 22
IEEE/ASTM SI 10 Standard for Use of the International System of Units (SI) The Modern Metric System
3. Terminology
3.1 Definitions:
3.1.1 The following terms are applicable to this test method and can be found in either Terminology E473 or Terminology E1142:
boiling pressure, boiling temperature, differential scanning calorimetry (DSC), differential thermal analysis (DTA), vapor pressure,
vaporization point, vaporization temperature.
3.2 Symbols:
3
3.2.1 A, B, C—Antoine vapor pressure equation (1) constants (log , kPa, K):
10
Antoine vapor pressure equation:Log P 5 A 2 B/ T1C
~ !
10
Antoine vapor pressure equation :Log P 5 A 2 B/~T1C!
10
where:
P = vapor pressure, kPa, and
T = temperature, K.
P = vapor pressure, kPa,
T = temperature, K, and
A, B, and C = constants.
4. Summary of Test Method
4.1 In thermal analysis, a physical property of a material is measured either as a function of time at a specified constant
temperature, or more frequently, as a function of temperature under conditions of a fixed rate
...