Determination of Lead in Gasoline by Atomic Absorption Spectrometry with a Carbon Rod Atomizer

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Abstract
The use of A carbon rod atomizer for the analysis of small amounts of lead in gasoline is described. Variables affecting sensitivity studied include: type of lead salts and type of solvent for standard, sample preparation, and atomizing temperature. A serious problem in the analysis of gasolines for tetraalkyl lead additives by atomic absorption spectrometry is that different lead compounds show different absorbances. This problem can be avoided by the addition of halogen or halides to the gasoline solutions diluted with methyl isobutyl ketone (MIBK). A standard method for atomic absorption spectroscopy with A carbon rod atomizer system for lead is described. The detection limit is 0.001 ppm Pb.