ASTM E 1131 : 2025

1.1This test method provides a general technique utilizing thermogravimetry to determine the amount of highly volatile matter, medium volatile matter, combustible material, and ash content of compounds. This test method will be useful in performing a compositional analysis in cases where agreed upon by interested parties.

1.2This test method is applicable to solids and liquids.

1.3The temperature range of a test is typically room temperature to 1000 °C, though lower or higher final temperatures may be used depending upon user needs and instrument capabilities. Composition between 1 weight % and 100 weight % of individual components may be determined.

1.4This test method utilizes an inert and reactive gas environment.

1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6This 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.

1.7This 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.