Split Ratio Linearity

Split ratio linearity

The split ratio only has a linear effect on sample concentration between 200: 1 and 25: 1. Reducing the split ratio lower than 25: 1 will not give a linear increase in sample concentration. Going from 20: 1 to 10: 1 will not double the amount of sample on column. At low split ratios, there can be an increase in peak broadening especially of early eluting peaks (maybe also column overload). High split ratios above 200:1 can give mass discrimination (also wastage of carrier gas). Fast GC can have splits up to 1000:1. Since flow of column is lower the amount of carrier put to atmosphere is much lower also.

Split ratio linearity

 


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SGE's liner selection tool helps you select the right inlet liner for your analysis

Injection Port Liners

The tool also includes a handy Vapor Volume Calculator that checks if you are injecting too much for a particular liner.  It can help you avoid the ghost peaks, injector contamination, and quantitation errors associated with Flashback.