Issue 1241, 1979

High-frequency microtitrimetric determination of acidic and basic constituents in lubricating oils. Part II. Determination of total base number

Abstract

A high-frequency microtitration method is described for the determination of total base number in new and used lubricating oils. The sample, dissolved in toluene-propan-2-ol-water (5 + 4.95 + 0.05), is titrated with standard alcoholic hydrochloric acid solution. A study of solvents, titrants, sample size and other experimental parameters is reported. This method provides sharp breaks at the end-points of the titration graphs and more repeatable and faster results than those obtained with the standard potentiometric method. The method can also be used for macrotitrations, with a commercially available oscillator, and can be suggested as an alternative to ASTM and IP methods for the determination of total base number.

Article information

Article type
Paper

Analyst, 1979,104, 739-749

High-frequency microtitrimetric determination of acidic and basic constituents in lubricating oils. Part II. Determination of total base number

T. Fernández, J. M. Rocha, N. Rufino, A. G. Luis and F. G. Montelongo, Analyst, 1979, 104, 739 DOI: 10.1039/AN9790400739

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