Contact: phone: +49 (0) 821 450 423-19 ASG Analytik Service Gesellschaft mbH fax: +49 (0) 821 486 2519 Dr. Markus Eschner e-mail: [email protected] Trentiner Ring 30 • 86356 Neusaess • Germany Info letter Nᴼ 02/2014 Analysis of Crude Oil and Heavy Fuel Oil by High Temperature Comprehensive Two-Dimensional Gas Chromatography Time-of-Flight Mass Spectrometry (HT-GC×GC-TOFMS) Figure 1 depicts a 2D contour plot of a heavy fuel oil sample analyzed by the LECO Pegasus 4D GC×GC-TOFMS consumable free instrument. The sample can be subdiveded into several main groups by using classification in combination with Visual Basic scripting toolbox, both being integrated in the ChromaTOF software package. The magnified section of the alkane region around n-eicosane exhibits the explored fine structure of the particular iso- and n-alkanes enabling to determine of their ratio. A semiquantification can also be performed and Figure 2 exhibits a pie chart with the percentage distribution of the assigned chemical classes. Figure 1: 2D contour plot of a heavy fuel oil exhibiting several chemical classes being explored by GC×GC-TOFMS Features of HT-GC×GC-TOFMS analysis D developed by ASG: - sample investigation up to n-C60 possible - detailed information about chemical composition of high boiling samples - determination of n-/iso-alkane ratio - several other parameters and customized analyses on request - prizes on request 11.25% 11.46% 15.06% 13.20% 29.05% 11.03% 6.00% 1.02% 1.93% n-Alkanes iso-Alkanes Cycloalkanes Monoaromatics Diaromatics Triaromatics Tetraaromatics Polyaromatics Heteroaromatics Figure 2: Pie chart with percentage distribution of assigned chemical classes of a heavy fuel sample