In this study the levels of S, As, Cd, Hg, and Pb in fuels were determined through electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS). The fuel samples were injected into a graphite furnace in the form of emulsions containing 3% (m/v) fuel, 0.5% (m/v) tartaric acid, 1% (m/v) Triton X-100, and 0.5% (v/v) HNO3. Pd (1 μg) was used as a modifier. Analyses were performed using dynamic reaction cell (DRC) ICP-MS with O2 as the reaction gas. The method obviated the effects of polyatomic isobaric interference at m/z 32 and 75 by detecting 32S+ and 75As+ as their oxide ions 32S16O and 75As16O at m/z 48 and 91, respectively with much less interference. The developed method was applied to the determination of S, As, Cd, Hg, and Pb in three fuel samples obtained locally. The analytical results were in good agreement with those of digested samples analyzed through membrane desolvation sample introduction DRC ICP-MS, with 95% confidence according to Student's t-test. The precision between sample replicates was better than 8% when using the ETV-ICP-MS method. The detection limits for S, As, Cd, Hg, and Pb in the original fuel samples, obtained from standard addition curves, were 39, 0.07, 0.1, 0.07, and 0.07 ng g−1, respectively.