High RSD in AutoTune

Hi, I assume from these pictures that you tune for cobalt mz 59. The counts are very low. Is that normal?

I do a startup tune with 10 ppb Li, Y, Co, Ce, Tl. And for Co I normally have something like 200000 cps. My experience is that with very low counts the RSD is always relatively high.

Hello,

Check tuning parameters.  Energy discrimination should be range 3v instead of 5v in He mode.

Try with normal tuning or default to see if something is wrong with the instrument.

Maybe it's not align with the cones. 

Difficult to tell with just the tune. 

Like carwogill says, counts are low. 800 is low for a tunning, so you would expect a high RSD. which solutions are you using?

Seems you tried a lot of things, did this results appear from one day to the other?

I also use the nebulizer gas in 0,9-1 L/min and sample depth in 7~8. It increases oxides but also takes more counts. Also the He flow seems really high.

But maybe your measurements need those configurations.

Have you recently exchanged the gas filter cartridge? If so, you need to purge the new filter, as it comes filled with Nitrogen from the factory.

We haven't changed out out gas filter cartridge.

I use the default tuning options for both Performance Test and Auto Tune. The Performance Test shows no issues, only the Auto Tune. I will try to adjust the energy discrimination.