Low sensitivity

Hi, we have an ICP-MS-QQQ Agilent 8900. Some days ago, we noted the counts for mass 91 on traditional UP dating on zircons were low. So, we did the PA factor and had a low signal on mass 47. We cleaned the sampling cone and skimmer and did the PA factor again, but the results are the same, look at the following picture and the excel attached: 

/cfs-file/__key/communityserver-discussions-components-files/45/PA-factor.xlsx

What should I test now?

Parents Reply
  • Hi, since the low sensitivity, I reported some days ago, I was following the Agilent ICP-MS Interactive Troubleshooting tool for Low sensitivity. I get to step 1.2.2 Adjust res/axis using mass 12, 56, and 80. (2) Check “On” for “Resolution Axis”. Uncheck the others. Click “Add to Queue” to Execute startup. 

    And this optimization Error popped up: EM setting has been stopped because the signal was unstable. Check the stability of the signal and run EM setting again.

    What should I do?

Children
No Data
Was this helpful?