1. Scope

1.1 This test method covers 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 may be used for the temperature range 273 to 773 K (0 to 500 degrees C) and for the pressures between 5 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 Computer or electronic-based instruments, techniques, or data treatment equivalent to this test method may also be used. 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. In the case of dispute, only the manual procedures are to be considered valid.

1.4 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.

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 this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

SI 10 Standard for Use of the International System of Units (SI) The Modern Metric System

Keywords

Antoine equation; boiling pressure; boiling temperature; differential scanning calorimetry (DSC); differential thermal analysis (DTA); vapor pressure; Antoine equation; Boiling temperature/pressure; Differential scanning calorimetry (DSC); Differential thermal analysis (DTA); Liquids--laboratory applications; Thermal analysis (TA); Vapor pressure (VP x )

ICS Code

ICS Number Code 17.200.10 (Heat. Calorimetry)

DOI: 10.1520/E1782-98

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