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    ASTM E2008 - 17(2021)

    Standard Test Methods for Volatility Rate by Thermogravimetry

    Active Standard ASTM E2008 | Developed by Subcommittee: E37.01

    Book of Standards Volume: 14.05

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    Significance and Use

    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.

    5.2 The extent of containment achieved for specimens in these test methods by means of a pinhole opening between 0.33 mm to 0.38 mm allows for measurement circumstances that are relatively insensitive to experimental variables other than temperature. Decreasing the extent of containment by use of pinholes larger than 0.38 mm will increase the magnitude of the observed rate of mass loss but will also reduce the measurement precision by increasing the sensitivity to variations in other experimental variables.

    5.3 Results obtained by these test methods are not strictly equivalent to those experienced in processing or handling conditions but may be used to rank materials for their volatility in such circumstances. Therefore, the volatility rates determined by these test methods should be considered as index values only.

    5.4 The volatility rate may be used to estimate such quantifiable values as drying interval or the extent of volatile release from a process.

    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 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 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.

    1.6 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 (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

    E1142 Terminology Relating to Thermophysical Properties

    E1582 Test Method for Temperature Calibration of Thermogravimetric Analyzers

    E1860 Test Method for Elapsed Time Calibration of Thermal Analyzers

    E2040 Test Method for Mass Scale Calibration of Thermogravimetric Analyzers

    ICS Code

    ICS Number Code 19.020 (Test conditions and procedures in general); 71.040.50 (Physicochemical methods of analysis)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/E2008-17R21

    Citation Format

    ASTM E2008-17(2021), Standard Test Methods for Volatility Rate by Thermogravimetry, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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