Chromatography Forum

Hi all,

I am using an HP5890 Series II GC equipped with an FID and ECD. I have another one equipped with a TCD. Up to now, I have been using the GC/TCD for analysis of N2O in air samples with He as the carrier gas. It's OK but not that great at low levels. But I am analyzing some other anaesthetic gases (sevo, iso, and desflurane) with GC1 using H2 as the carrier gas and the FID as the detector. At some point in the future, I will need to analyze the sevo, iso, des, and the N2O in the same sample and the info I have observed in this forum and elsewhere is that the ECD is great for N2O detection at low levels (< 100 ppm). So, my question is can I still use H2 as the carrier gas through both columns (RTX 502.2 for the sevo, iso, des) and the Q-plot for the N2O if I hook up both columns to the one injector we have in GC1 but hook the RTX to the FID and the Q-plot to the ECD?

Thanks.

Hi all,

This is just an update for anyone who may look at this post in the future and wondered. We switched from He to H2 as a carrier gas for N2O analysis through the ECD. Looks like it works fine.

Good to know. Thanks for the info.

For your information, for analysis of N2O with sensitivity down to 1ppb and getting rid of radioactive source, I work with PED from LDetek. You can have a look at our web site at www.ldetek.com and there is information about Plasmadetek2 and some application note for N2O and others.
Feel free to contact me if you have any questions: dgagne@ldetek.com

Thanks

Good to know. Thanks for the info.

For your information, for analysis of N2O with sensitivity down to 1ppb and getting rid of radioactive source, I work with PED from LDetek. You can have a look at our web site at http://www.ldetek.com and there is information about Plasmadetek2 and some application note for N2O and others.
Feel free to contact me if you have any questions: dgagne@ldetek.com

Thanks

Dear tigerk

I've worked with Atomic Emission Detector ( AED 2350 ) on GC.
Please let me know if your detector is based on same technology?
I'll be glad to hear from you.
bahram111@yahoo.com