Northeast Corridor Regional Modeling Project - Determination of Organic Species Profiles for Gasoline Liquids and Vapors

摘要

The Office of Air Quality Planning and Standards (OAQPS) is undertaking a large program to validate and demonstrate photochemical oxidant diffusion models. This report presents the results of a study to determine organic species profiles for gasoline liquids and vapors for 20 samples of gasoline(s) collected from the five metropolitan areas. The purposes of this study were (1) to determine organic species profiles for gasoline vapors for use in photochemical modeling applications, (2) to compare organic species profiles for gasoline vapors to organic species profiles of gasoline liquids, and (3) to determine the effect of temperature on gasoline vapor speciation. For each of the 20 samples, both the liquid organic species profile and the vapor organic species profile at an equilibrium temperature of 80F (27C) were determined by gas chromatography (GC) analysis. The Exxon regular leaded and Exxon regular unleaded Philadelphia samples were also analyzed for vapor organic species at an equilibrium temperature of 60F (16C), 100F (38C), and 120F (49C).