ASTM D874
Scope
1.1 This test method covers the determination of the sulfated ash from unused lubricating oils containing additives and from additive concentrates used in
compounding. These additives usually contain one or more of the following metals: barium, calcium, magnesium, zinc, potassium, sodium, and tin. The elements sulfur, phosphorus, and chlorine can
also be present in combined form.
1.2 Application of this test method to sulfated ash levels below 0.02 % by mass  is restricted to oils containing ashless additives. The lower limit of the
test method is 0.005 % by mass sulfated ash.
Note 1: This test method is not intended for the analysis of used engine oils or oils
containing lead. Neither is it recommended for the analysis of nonadditive lubricating oils, for which Test Method D482 can be used.
Note 2: There is evidence that magnesium does not react the same as other alkali metals in
this test. If magnesium additives are present, the data is interpreted with caution.
Note 3: There is evidence that samples containing molybdenum can give low results because
molybdenum compounds are not fully recovered at the temperature of ashing.
1.3 Fatty acid methyl ester (FAME) conforming to EN 14213 and EN 14214, when tested using this test method, were shown to meet its precision.
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.
Keywords
additives; ash; lubricating oils;
ICS Code
ICS Number Code 75.100 (Lubricants, industrial oils and related products)
DOI: 10.1520/D0874-23