Chromatographic andpurge& trap cycle times have been the
limiting factor for volatile analysis formanyyears.With the
advent of interfacing twopurge& trap concentrators ontoone
GC/MS, analysts are now interested in columnswith sub-ten-
minute runtimes.
Introduction
TheRtx-VMS chromatogram shown below spectrally resolves
all of the target compounds inunder 10minutes. Faster
runtimes are possible by substituting chlorobenzene-D5with an
alternate internal standard. This solutionworks for theVMS
phase butwill notwork for other phases since the resolutionof
isomers is compromised. This paperwill compare other phases
rununder these conditions for separationof isomeric pairs.
