Chemistry Seminar Series

Wed, 24 Oct 2018
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Dr. Kevin Thurbide

University of Calgary

New Approaches in the Chromatographic Analysis of Sulfur Compounds

Wednesday, October 24, 2018
B9201 @ 3:30 p.m.

Host: Dr. Byron Gates

Abstract

Sulfur compounds exist in a variety of forms and concentrations in many petroleum products such as lubricants, crude oils, and different grades of fuel. Since their combustion can lead to undesirable damage to engines and the environment, they are routinely analyzed as part of industrial optimization and regulatory compliance processes. While numerous methods are available for the determination of such sulfur compounds, gas chromatography with selective detection is one of the most popular of these approaches. The flame photometric detector (FPD) is a very widely used selective detector for this purpose. However, its major limitations include the severe signal quenching that occurs from co-eluting hydrocarbons and the lack of a uniform response over a range of compounds. We have been addressing these issues through developing new analytical methods for sulfur analysis. In one area, we have introduced a novel Multi-Flame Photometric Detector that can significantly improve upon the performance of this device in several different ways and open an effective pathway to its incorporation into microfluidic GC platforms. In another, we have been developing a novel stationary phase that can offer much better separations of sulfur analytes within such matrices and enhance their detection by conventional FPD. This seminar will present an overview of these approaches and their operating characteristics will be discussed. 

Keywords

Sulfur analysis; gas chromatography; flame photometry; micro flame arrays; miniaturized analytical; water-based separations