1.1 This method covers the determination of basic constituents in petroleum products by potentiometric titration with perchloric acid in glacial acetic acid.
1.2 For many materials the results obtained by this method will be similar to those obtained by IS : 1448 [P: 1 ]-1971*. With certain compounds such as strongly overbased oil additives and nitrogenous polymeric compounds, higher results may be obtained.
1.3 The constituents that may be considered to have basic characteristics include organic and inorganic bases; amino compounds; salts of weak acids, for example, soaps; basic salts of polyacidic bases; and salts of heavy metals.
IS 1448 Pt.86-1977 history
1978IS 1448 Pt.86-1977 Test methods for petroleum and its products [P: 86] Determination of total base number by potentiometric titration