ISO 3771:2011
Petroleum products - Determination of base number - Perchloric acid potentiometric titration method
- Standard No.
- ISO 3771:2011
- Release Date
- 2011
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 3771:2011
- Scope
- This International Standard specifies a method for the determination of basic constituents in petroleum products by potentiometric titration with perchloric acid in glacial acetic acid. The constituents that can be considered to have basic characteristics include organic and inorganic bases, amino compounds, salts of weak acids (e.g. soaps), basic salts of polyacid bases, and salts of heavy metals. The ranges of base number values for which precision values for the method have been established are: — unused oils: base numbers from 3 to 45; — additive concentrates: base numbers from 5 to 45; — used oils: base numbers from 3 to 30.
ISO 3771:2011 Referenced Document
- ISO 3696 Water for analytical laboratory use; Specification and test methods
ISO 3771:2011 history
- 2011 ISO 3771:2011 Petroleum products - Determination of base number - Perchloric acid potentiometric titration method
- 1994 ISO 3771:1994 Petroleum products - Determination of base number - Perchloric acid potentiometric titration method
- 1977 ISO 3771:1977 Petroleum products; Total base number; Perchloric acid potentiometric titration method
