Lecture 372014.pdf

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Department
Chemistry
Course
CHEM 2121
Professor
Nicholas Frost
Semester
Spring

Description
Lecture 372014Friday March 7 20141221 PMFrom last lecture TemperatureIdeally want to find single T to cover all retentions and get everything in a reasonable time w good resolutiongeneral elution problem wide range of retentionswill have to wait a very long time to get slowest things but still have good resolution do T ProgrammingTo get more closely spaced peaks but with still good resolutionincrease T like thisWhat are the downsides of T programmingtrial and errorreproducability and retention time are worse when youre constantly changing T and keep reequilibratingwe want to be able to do this repetitivelyT programming needs more maintanence than isothermalGC in Process Analysisusually runs on its ownno person operates itif dont know how long to wait can make T very high and cool down as neededwant
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