What did they have to say?
Are you running and “on-column” injector?
Their “heated injector”?
Split?
I ask because I tried running a fused silica column with an on column injector once upon a time, and broke the column a couple or four times with the needle before installing a guard column…I also found the junction between the two to be a little finicky. I do think fused silica gives better resolution than the stainless versions with similar coatings.
I’ve just picked up another SRI, and as soon as my UHP hydrogen gets into town, I can start playing with it (heated injector:FID:MXT502.2), and see what a TCD can do with H2 as carrier rather than N2.
The TCD works great for seeing water in methanol with the N2, but that’s injecting 1ul of solvent, and you have to have the gain most of the way up…to see the SOLVENT! …but you can quantitate water in your methanol the single digit range.
Also want to see how feeding an FID on N2 carrier does…because that enables an auto-magic headspace with N2 feed.
My current workhorse is a 310 with on-column and heated injector ports leading to an FID. it has a built in H2 generator, and what i believe was Hugh’s second or third “edibles mod” (backflush plumbing) MXT-WAX on the heated injector for terpenes at the moment, and I can’t remember the combo on the edibles mod …it’s not ideal anyway, but it was free! I’d like to use the backflush so I can do high resolution liquid tepenes, and backflush the cannabinoids…but first I need to wrap my head around what makes the correct “leader”. same stationary phase but thinner coating? maybe?