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Significance and Use
5.1 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.
5.2 This test method may be used for research and development, specification acceptance, and quality assurance purposes.
1.1 This test method describes the determination of sulfated ash content (sometimes called residue-on-ignition) of organic materials by thermogravimetry. This test method converts common metals found in organic materials (such as sodium, potassium, lithium, calcium, magnesium, zinc, and tin) into their sulfate salts permitting estimation of their total content as sulfates or oxides. The range of this test method is from 0.1 to 100 % metal content.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
D874 Test Method for Sulfated Ash from Lubricating Oils and Additives
D914 Test Methods for Ethylcellulose
D3516 Test Methods for Ashing Cellulose
E473 Terminology Relating to Thermal Analysis and Rheology
E1131 Test Method for Compositional Analysis by Thermogravimetry
E1142 Terminology Relating to Thermophysical Properties
E1582 Test Method for Temperature Calibration of Thermogravimetric Analyzers
E2040 Test Method for Mass Scale Calibration of Thermogravimetric Analyzers
Other StandardsThe United States Pharmacopeia XXII and The National Formulary XVII, United States Pharmacopeial Convention, Rockville, MD, 1990, Section 281, p. 1527
ICS Number Code 71.040.40 (Chemical analysis)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM E2403-06(2018), Standard Test Method for Sulfated Ash of Organic Materials by Thermogravimetry, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top