A multidimensional gas chromatographic approach using planar microfluidic devices for Deans switching has been developed and implemented for the characterization of sterically hindered phenolic compounds used as antioxidants in fuels. Detection and quantitation was conducted with MS in selected ion monitoring mode. A complete analysis is conducted in less than 15 min with precision greater than 5.5% at 1 and 25 ppm w/w (ppm_w). LODs of 50 ppb w/w (ppb_w) or better in selected ion monitoring mode and a linear range of 100 ppb_w to 100 ppm_w with a correlation coefficient greater than 0.998 were attained for all analytes. Unique to this analytical configuration is the use of a mass spectrometer capable of monitoring the column effluent from either dimension by incorporating a high-temperature rotary valve and a three-port planar microfluidic device. High-molecular-weight (C₂₅–C₄₀) fuel contaminants eluting from the first column can be selectively sent to the mass spectrometer for profile characterization in scan mode. These compounds would otherwise be retained substantially by the low-phase-ratio analytical column employed in the second dimension.

Item Type:	Refereed Article
Keywords:	antioxidants, ethylene glycol, multidimensional gas chromatography, planar microfluidic devices, sterically hindered phenolic compounds
Research Division:	Chemical Sciences
Research Group:	Analytical Chemistry
Research Field:	Separation Science
Objective Division:	Expanding Knowledge
Objective Group:	Expanding Knowledge
Objective Field:	Expanding Knowledge in the Chemical Sciences
Author:	Luong, J (Mr Jim Luong)
Author:	Cortes, HJ (Dr Hernan Cortes)
Author:	Shellie, RA (Associate Professor Robert Shellie)
ID Code:	86400
Year Published:	2013
Web of Science® Times Cited:	6
Deposited By:	Austn Centre for Research in Separation Science
Deposited On:	2013-09-12
Last Modified:	2014-05-08
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