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- Posts: 2
- Joined: Thu Jul 04, 2019 7:40 am
Currently I use a GCMS-FID with a Tee at the column outlet (HP-5MS 30mx250µx0.25µ) and 2 inert columns.
* 1 inert column of 5.70 m x 0.18 mm towards the MS
* 1 inert column of 2.5m x 0.18mm towards the FID
The lengths have been determined by the installer and the flow rate is 1.1 mL/min
I want to change column for another (30m x 320µ x 1µm).
Is it necessary to change the lengths between the detectors since the diameter of the column is different?
How to calculate the lengths?
Using the Hagen-Poiseuille law?
In a previous post "GC FID MS", a user mentions a file for the calculation but the link is broken.
In another post "Simultaneous MS and FID runs on GC", a user mentions the Swafer Utility program
Software
Thank you in advance for your help.
Cordially