The Gulf Coast Conference is a non-profit organization for the advancement of knowledge in Chemical Analysis Technology associated with Petrochemical, Refining, and Environmental fields.
Fast Analysis of Middle Distillates using Gas Chromatography-Vacuum Ultraviolet Spectroscopy by Alex Hodgson, VUV Analytics
Middle distillates like jet fuel and diesel have strict requirements regarding aromatic content to reduce pollution and maximize engine life. The current referee method, ASTM D1319, is becoming unsustainable as remaining dye stocks wane. Current alternative methods include supercritical fluid chromatography (SFC) and high-performance liquid chromatography (HPLC).
Vacuum ultraviolet (VUV) spectroscopy is a relatively new GC detection methodology that can analyze jet fuel in less than 14 minutes and diesel in less than 20 minutes. Automated quantitation using time interval deconvolution (TID) can determine total mono- and di-aromatics for jet fuel and total mono-, di-, tri-, and tetra-aromatics for diesel.
Hydrogen and Nitrogen as Carrier Gas Alternatives to Helium: Gas Chromatography-Vacuum Ultraviolet Spectroscopy of Hydrocarbon Groups and Select Compounds in Gasoline-Range Samples by Ryan Schonert, VUV Analytics
ASTM D3606 (benzene), ASTM D5599 (ethanol, oxygenates), and ASTM D5769 (benzene, toluene, total aromatics) gasoline tests typically require three dedicated GC systems, all using helium carrier gas, which is in short supply. ASTM D8071-17, PIONA and oxygenates analysis with gas chromatography – vacuum ultraviolet spectroscopy (GC-VUV), allows benzene, toluene, total aromatics, and ethanol, as well as other parameters, to be accomplished on one GC in less than 35 min.
Helium use can be eliminated entirely by employing alternate GC carrier gases, such as hydrogen and nitrogen. This presentation will demonstrate how using GC-VUV for the analysis of gasoline-range samples.
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