G3449-90000 inlet interface

Question

Is there a way to modify or remove the metal tube under the turn top assembly for the G3449-9000 inlet interface? This tube prevents the use of headspace liners with I.D. > 2mm

Dr. Know · Accepted Answer

Hi Tamara, 
 both are for Headspace and both have an OD of 6.5 mm, so yes you can use it. The sample loop determines what volume you will inject and the liner is only kind of an appendage connecting the HS system with the GC, that should normally have the smallest possible volume to not add dead volume to the flow path. I personally would use the 1.5 mm ID liner for the 1 mL sample loop and the 2 mm liner for the 3 mL loop. I wouldn't recommend going bigger as this will give you broader peaks and therefore worse LODs.

CMZainea · Answer

Hello tbutter5 , 
 
 I corrected the title, as it seemed it was missing a 0. 
 
 The short answer is that no, you cannot remove that tube. The longer answer is that the tube can only be used with liners that have an ID of 2 mm or more. I wonder if you made a typo in your question and you meant "< 2 mm". 
 
 If you actually cannot use that with a liner that has more than 2 mm, then there could be something else going on there.

G3449-90000 inlet interface

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