Chromatography Forum

Posted: **Mon Jun 01, 2015 1:20 pm**

Hi Dear.
Firstly I would like to thank you for acceptance to join your forum which will be very helpful for me .

Secondly Ihave a problem with the total pressure of GC column than the set value although all fittings are tight and the carrier gas cylinder is nearly full and my setup is :
GC-17A
Carrier gas...nitrogen
Flow rate ....3ml/min
Splite ratio....50
Inj. temp....150 C
Det. temp....250 C
Column...DA-Carbowax 20M
Thanks.

Posted: **Mon Jun 01, 2015 1:49 pm**

Welcome to the forum.

What pressure do you set, and what pressure do you get ? Is the pressure stable ?

Is the flow through the column at its set value ?

Are the the split flow and septum purge flows what they should be ?

What is the pressure in the lines feeding the carrier gas to the GC ?

Peter

Chromatography Forum

Lower total GC column pressure than the set value

Lower total GC column pressure than the set value

Re: Lower total GC column pressure than the set value