QUALITATIVE SEARCH OF ETHYLENEAMINE COMPLEX INDUSTRIAL MIXTURES IN LUBRICANT DISPERSANTS THROUGH MILD SAPONIFICATION FOLLOWED BY CAPILLARY GAS-CHROMATOGRAPHY

Aliphatic amines complex mixtures used in the synthesis of polybutenyl succinimide dispersants can be qualitatively identified, after a mild saponification, by gas chromatography on a 5% diphenyl-94% dimethyl-1% vinylpolysiloxane WCOT capillary column through temperature programmi ng. Dual detection with flame ionisation detector and thermoionic dete ctor, sensitive only to nitrogen (and phophorus) compounds, is used. E xamples are given for a commercial concentrate and for an engine motor oil.