b A gas chromatographic methodwith flame ionization detection for the determination of lead alkyls and scavengers in gasolines is described. These compounds are separated in a partition column and hydrogenated using a nickel catalyst, and the resulting methane and/or ethane is separated from gasoline hydrocarbons on an adsorption column. The equipment employed and its application to the continuous analysis of leaded gasolines are discussed. The reliability of results and the lack of interferences are verified with both laboratory-prepared and commercial samples. HE steady increase in the use of mix-

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