The change in retentionbetween the chlorotoluenesmodeledon
theVMS&624phases is 0.03minute, which in reality,
constitutes a significant difference since this data is produced
with a 20mx 0.18mm ID columnwith a 40°C/minute oven
ramp rate. A faster final oven ramp rate is possible using the
VMSphase since these compounds arewell separated. Using a
60mx 0.53mm IDx 3.0df column for a direct comparison the
difference between these phases is 0.9minute. The 624phase is
suitable for fast dual-purge& trap applications. Analytes that
share ions and coelute on the 624phase and are resolvedby the
VMS include: ether/ethanol, vinyl acetate/ethyl-tert-butyl-ether
& t-butyl alcohol/methyl-tert-butyl-ether. Several of these
compounds require a lower startingoven temperature (35°C)
using theVMSphasewhich is not shown in this application.
Rtx-VMSCompared to theRtx-624
