Varian CP-3800 PFPD repeating ghost peaks
Posted: Fri Sep 20, 2019 5:51 am
Dear all!
This is not the first time with this instrument. Usually when many of samples with very dirty matrix injected on the instrument i have to replace the combustor to solve this problem. I exchanged it for about a month ago. That got the same problem.
The diagnosis: The signal of the instrument is sawteeth likish, even reapatable peaks appaear for time goes on.
I've exchanged liner, even syringe to avoid every chances to contaminate. It is very certain that the combustor tube got dirty. Now i will cut the coloumn endings, but i'm certain that nothing will happen.
My question is, anybody have had same problem, what got solved by not exchanging combustor tube. Cleaning methods, etc.? Maybe the ignition cable?
Thanks for your answers.
This is not the first time with this instrument. Usually when many of samples with very dirty matrix injected on the instrument i have to replace the combustor to solve this problem. I exchanged it for about a month ago. That got the same problem.
The diagnosis: The signal of the instrument is sawteeth likish, even reapatable peaks appaear for time goes on.
I've exchanged liner, even syringe to avoid every chances to contaminate. It is very certain that the combustor tube got dirty. Now i will cut the coloumn endings, but i'm certain that nothing will happen.
My question is, anybody have had same problem, what got solved by not exchanging combustor tube. Cleaning methods, etc.? Maybe the ignition cable?
Thanks for your answers.