Analytical applications of emulsions: determination of lead in gasoline by atomic-absorption spectrophotometry

Abstract

A rapid and simple atomic-absorption spectrophotometric method for the determination of lead in commercial gasolines, based on the formation of a stable oil-water emulsion using a suitable emulsifier and further aspiration into the flame, has been developed. The effect of different matrices and of lead alkyl compounds on sensitivity is not significant, several calibration procedures being possible. The accuracy was confirmed by statistical comparison with the ASTM titrimetric method.