Abstract
Abstract This article describes the development of a method for determining the presence of methyl tert-butyl ether (MTBE), in a matrix of gasoline vapors and in liquid gasoline samples, with the simultaneous analysis of benzene, toluene, xylenes, and total hydrocarbons. An assessment of the method's performance based on field use is also included. The method recommends collection of air samples for MTBE on 400- and 200-mg coconut-shell charcoal tubes in series, desorption in carbon disulfide, split-vent injection, analysis by gas chromatography (GC) using a capillary column, and detection by flame ionization detector. The analysis of liquid gasoline samples is accomplished by direct GC injection. The estimated limit of detection for air samples is 20 μg MTBE per sample, and 0.002 percent MTBE for liquid gasoline samples. The estimated analytical precision of MTBE standards in the range of 9 to 426 μg/mL is 4.5 percent. Samples stored at ambient temperature are stable for at least 5 days. MTBE-spiked samp...
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