How to improve low area problem of testing blank?
Posted: Mon Aug 14, 2017 2:21 am
Hi!I'm new to operate GC-MS, I'm in trouble to situation like photos in the link
https://drive.google.com/drive/folders/ ... sp=sharing
I'm trying to measure several testing blank , and as you can see, the result of area of compound PAD is really low, all of them are under 100(large data in the middle are standard solution, 4 ppm and 12 ppm).
I've got two comment to this problem:one said that I didn't setup right so machine cannot catch the right m/z ion, and the other said I should raise sensitivity.
To the first comment, I use SIM to setup when to start to detect the ion, and setup its target ion, I don't understand what more I can do?And to the second comment, I'm sure all consumable are new and clean, what else I can do to improve sensitivity?
The model of GC/MS:Agilent 7890B/5977B
Columns:DB-5ms Ultra Inert 30 m X 250 um X0.25 um
https://drive.google.com/drive/folders/ ... sp=sharing
I'm trying to measure several testing blank , and as you can see, the result of area of compound PAD is really low, all of them are under 100(large data in the middle are standard solution, 4 ppm and 12 ppm).
I've got two comment to this problem:one said that I didn't setup right so machine cannot catch the right m/z ion, and the other said I should raise sensitivity.
To the first comment, I use SIM to setup when to start to detect the ion, and setup its target ion, I don't understand what more I can do?And to the second comment, I'm sure all consumable are new and clean, what else I can do to improve sensitivity?
The model of GC/MS:Agilent 7890B/5977B
Columns:DB-5ms Ultra Inert 30 m X 250 um X0.25 um