GC Determination of Oxygenates in Gasoline by ASTM D4815 and D5599

The Thermo Scientific TRACE GC Ultra easily and reliably determines oxygenates in gasoline in compliance by ASTM D4815 or D5599. The former is based on multidimensional GC, with 2 columns featuring different polarities and a switching valve in between, with detection based on the universal response of FID or TCD. D5599 is achieved by an oxygen selective detection system, the O-FID, consisting of a cracking micro-reactor able to selectively convert the oxygenated compounds into CO, and of a methanizer to convert the CO into methane, finally detected by FID.Both the techniques can be performed on the TRACE GC Ultra and are proven to be suitable. The O-FID method, compared with the multidimensional GC method, offers a simpler instrument set-up, and easier and faster calibration. For more information on these capabilities, visit www.thermo.com/gc