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ASTM D974-14e2
Standard Test Method for Acid and Base Number by Color-Indicator TitrationMore info
1.1 This test method covers the determination of acidic or basic constituents (Note 1) in petroleum products2 and lubricants soluble or nearly soluble in mixtures of toluene and isopropyl alcohol. It is applicable for the determination of acids or bases whose dissociation constants in water are larger than 10−9; extremely weak acids or bases whose dissociation constants are smaller than 10−9 do not interfere. Salts react if their hydrolysis constants are larger than 10−9.
Note 1: In new and used oils, the constituents considered to have acidic characteristics include organic and inorganic acids, esters, phenolic compounds, lactones, resins, salts of heavy metals, and addition agents such as inhibitors and detergents. Similarly, constituents considered to have basic properties include organic and inorganic bases, amino compounds, salts of weak acids (soaps), basic salts of polyacidic bases, salts of heavy metals, and addition agents such as inhibitors and detergents.
| Author | ASTM |
|---|---|
| Editor | ASTM |
| Document type | Standard |
| Format | File |
| ICS | 75.080 : Petroleum products in general 75.100 : Lubricants, industrial oils and related products |
| Number of pages | 7 |
| Replace | ASTM D974-14e1 |
| Set | ASTMVOL0501 |
| Year | 2014 |
| Document history | ASTM D974-14e1 |
| Country | USA |
| Keyword | ASTM 974;ASTM D974;ASTM D974;10.1520/D0974-14E02 |