GC/MS Analysis of Aromatics in Gasoline ASTM D5769

The unavailability of fluorescence dye has impacted the widely used D1319 method for determining total aromatics in reformulated gasoline.  To remain in compliance with EPA regulations, many labs are considering the more complex D5769 GC/MS method for total aromatics analysis.  This presentation will offer best practices for setting up, optimizing, and running this method on a new, cost effective Agilent 8860/5977 GC/MS system.  To further reduce operating expenses, the use of hydrogen carrier gas will be shown as well as a configuration to perform the analysis in less than 9 minutes.  For all three approaches, compliance with the D5769 performance criteria will be demonstrated.  Precision and accuracy will be evaluated using Tier III gasoline samples obtained from an inter-laboratory cross-check program (ILCP).