Answer to Question #39058 in Physical Chemistry for edward ton
I HAVE A QUESTION ABOUT GAS CHROMATOGRAPHY.WHEN WE USE CONSTANT PRESSURE OR CONSTANT FLOW FOR COLUMN OR IN MAKE METHOD FOR ANALYSIS?
With a more "dramatic" temperature program (larger temperature range), then you will see a reduction in retention time for late eluting compounds in constant flow mode. Additionally, you may see an improvement in resolution for late eluters in const flow mode as well, depending upon initial conditions. This is because there can be very significant changes in carrier gas linear velocity in constant pressure mode for temp programs with a large temperature range.
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