One GC with (FID+ECD+FPD)

[mgasparri]

Hi Everybody :
My company wants to replace our 5 GCs 5890 (FID+ECD) plus 5 GCs 5890(FPD) using manual injection to 5 GCs (FID+ECD+ECD) with automatic injection.
I was looking for an Agilent with Gerstel autosampler to save money in 5 GCs but it seems that only Thermo has this kind of GC with 3 detectors in the same equipment.
Any advice since I've never used Thermo GCs?
Thanks a lot!

[Peter Apps]

You can put 3 detectors onto a Varian CP-3800 GC.

Peter

[CE Instruments]

Thermo GC operates very similarly to the Agilent GC with the similar menus etc. The Split/splitless is much better and needs to run about 20C lower temperature than the Agilent injector. The downside of this efficiency is that the injector head is much hotter and septa bleed is worse. Avoid overtightening the septa as the higher heat and too much pressure produce coring of the septa and lots of bits in the injector.
Thermo option allows three detectors installed with FID stacked on ECD and they can be removed to have any combination of two on the detector base bodies. EPC vs DPFC. DPFC works on using software control of forward headpressure to give programmable pressure and flow (and constant pressure/Flow). This is impirically measured by the "Column evaluation". This coupled with a leak check allows automated leak checking and confidence that your column has been correctly installed. Works well and avoids need for "retention time locking" and having to run a standard. Go for the Triplus injector for flexibility and more reliable performance than the AS3000

[AICMM]

mgasparri,

I believe the new 7890 will also support 3 detectors, 2 on the right and one on the left. At least that is what I have heard.

Best regards.

[GasMan]

At the moment, the third detector on the side of the 7890 can only be a TCD.

Gasman

[GOM]

Hi,

You alone will know the ratio of demand for the 3 detectors but consider buying just 4 GCs - 2 x FID/ECD and 2 x FID/FPD.

a) The autosamplers will be giving you a huge increase in throughput
b) 3 detectors can make it overly complex and lead to problems
c) consider using the money for the 3rd detector for a second injection port instead.

Regards,

Ralph

[rubyfan]

Just get a Varian 3800. In my opinion, it's a very rugged, reliable GC system. We both have a Varian 3800 GC and two Agilent 6890 GCs here. My favorite is hands down the Varian.

[giacomo56]

First of all, how has Agilent been treating you? If you are happy with the company stick to them. The 7890 GC by far outpaces all others....the capillary flow technology is SOoooo far ahead of the rest, there's a reason why Agilent has market share. they make things that work!!!
Again, if they been good to you, why not be good to them?
My 3 cents worth.