Abstract: AA method for determining elements of lead, iron and manganese in gasoline simultaneously by energy-dispersive X-ray fluorescence spectrometry (EDXRF) was developed. The precision of this method was inspected. The results show a great linear relationship in the ion concentration range from 0μg/g to 100μg/g. The detection limits for lead, iron and manganese are 0.06, 0.4 and 0.09 μg/g, respectively. The recovery rates are between 91.7% and 107.9%, and the relative standard deviation is less than 3%. This method for determination of Pb, Fe, Mn in gasoline simultaneously is more simple and fast.

Key words: energy-dispersive, X-ray flourescence, lead, iron, manganese, gasoline, test method