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How should Splitter Flow be adjusated
Posted: Fri Jul 20, 2007 7:26 am
by atharwasim
in online GC application, How should splitter flow should be adjusted. When injection Valve is 'on' to delute the sample or otherwise when sample is being flushed
Regards,
Posted: Fri Jul 20, 2007 7:35 am
by Peter Apps
Online GCs usually have specialist inlet plumbing that does not necessarily conform to the usual split-splitless inlet of a bench GC. You need to refer to the operating instructions for the specific instrument that you are working with.
Peter
Split ratio
Posted: Thu Aug 16, 2007 5:53 pm
by praveenpaliwal
Hellow
I want to know the mean of 100:1 split ratio.
how it is releated to total flow, split vent flow and column flow
Posted: Thu Aug 16, 2007 6:05 pm
by AICMM
praveenpaliwal,
If your column flow is 0.5 mL/min, your are also sending 50 mL/min out the split vent and only loading 1/100th of the sample injected on column. If your column flow is 2 mL/min you are sending 200 mL/min out the split vent and only loading 1/100th of the sample on the column. In the first case you might be supplying a total flow to the injector of, perhaps, 55 mL/min: 0.5 for column, 50 for the split and 4.5 for the septum purge. Rarely works this cleanly but you get the idea.
Best regards.