New Methods for Atomic-Absorption Determination of Metals in Aviation and Automotive Gasolines

Methods were developed for direct atomic absorption determination of lead and lithium as components of antiknock additives in aviation and automotive gasoline at concentrations in the ranges of 100-1700 (lead) and 2.5/0.25-100 (lithium) mg/dm 3 . The conditions of atomization of the sample solutions and calibration solutions and elimination of the effect of the matrix of the analyzed samples on the results were achieved by suitable dilution of the samples and by including aliquots of solutions simulating the composition of gasolines prepared from individual high-purity hydrocarbons in the composition of the reference solutions and calibration solutions. The methods are characterized by high precision, are simple to use, and can be recommended for quality control and identification of gasoline.