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ASTM E2403-06

Historical Revision

Standard Test Method for Sulfated Ash of Organic Materials by Thermogravimetry

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1.1 This standard describes the determination of sulfated ash content (sometimes called residue-on-ignition) of organic materials by thermogravimetry. The method converts common metals found in organic materials (such as sodium, potassium, lithium, calcium, magnesium, zinc, and tin0 into their sulfate salts permitting estimation of their total content as sulfates or oxides. The range of the test method is from 0.1 to 100 % metal content.

1.2 SI values are the standards.

1.3 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 to determine the applicability of regulatory limitations prior to use.


The sulfated ash may be used to indicate the level of known metal-containing additives or impurities in an organic material. When phosphorus is absent, barium, calcium, magnesium, sodium and potassium are converted to their sulfates. Tin and zinc are converted to their oxides.

This standard may be used for research and development, specification acceptance and quality assurance purposes.

SDO ASTM: ASTM International
Document Number E2403
Publication Date March 1, 2006
Language en - English
Page Count 3
Revision Level 06
Supercedes
Committee E37.01
Publish Date Document Id Type View
Aug. 1, 2023 E2403-23 Revision
March 1, 2006 E2403-06 Revision
Oct. 1, 2004 E2403-04 Revision
April 1, 2018 E2403-06R18 Reaffirmation
Sept. 1, 2012 E2403-06R12 Reaffirmation