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TCD suddenly has no peak
Posted: Wed Apr 01, 2020 8:11 pm
by baiyu0756
TCD has no peak signal suddenly. I can hear the TCD clicking, the gas ratio is reference 18ml/min, makeup plus column 6ml/min), temperature for TCD detector is 225 degree C. The carrier gas is Ar. The TCD detector doesn't broken.I use same column and same method every day. There is no any peak suddenly, could someone help me out? Thank you very much!
Re: TCD suddenly has no peak
Posted: Fri Apr 03, 2020 11:07 pm
by osp001
When you zoom in to the signal, is it absolutely flat, or is there some noise when you zoom in as tight as you can?
How do you know the detector is functional if you're not getting any signal?
Manufacturer and model numbers may help.
Re: TCD suddenly has no peak
Posted: Sun Apr 05, 2020 10:01 am
by nipe
What GC? Check resistance of filaments. Real flow at outlets TCD? Temperature of working filaments?
Re: TCD suddenly has no peak
Posted: Thu Apr 09, 2020 8:39 am
by luisaguilar
Check resistance of filaments.
Re: TCD suddenly has no peak
Posted: Thu Apr 23, 2020 3:52 pm
by pwm
Most commonly no peak issues are syringe related, or no column flow to detector.
Re: TCD suddenly has no peak
Posted: Thu Apr 23, 2020 6:59 pm
by baiyu0756
Thank you for all your replies! I figured out it because the column was blocked.