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Multidimensional GC using planar microfluidic devices for the characterization of phenolic antioxidants in fuels
Author(s) -
Luong Jim,
Gras Ronda,
Cortes Hernan J.,
Shellie Robert A.
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201300383
Subject(s) - mass spectrometry , analytical chemistry (journal) , chromatography , microfluidics , chemistry , analyte , gas chromatography , spectrometer , materials science , nanotechnology , physics , quantum mechanics
A multidimensional gas chromatographic approach using planar microfluidic devices for D eans 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 ). LOD s 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 ( C 25 – C 40 ) 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.