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- Posts: 14
- Joined: Mon May 13, 2019 11:39 am
Anyone who have experience on this instrument/detector named above, have some sensitivity improving advice? I have some compunds that recently have almost gone from my chromatograms. (e.g.: Omethoate) Maybe it is happening because of the coloumn aging (half year old), but i have never used another options in the detector menu yet.
Anyone have some suggestions?
I'm running this instrument in slow flow rate (2,1 ml/min), phosphorous mode,
Tube voltage 510 V
Trigger level: 200 mV
Sampling delay 4,0 ms
sampling width 10,0 ms
Gain factor: 2
Make up gas (Type EFC13):
Air 17 ml/min
H2 13,0 ml/min
Air 2 : 10,0 ml/ min
Detector range: 10
Split ratio: initial: OFF then 0,75 min: ON 100, then 2,5 min: 20
So my goal would be to use any options to detect these compunds in spite of high standard concentration rates.
Thanks!