ICP-MS 7700 Tune report Mass 59


My tune report is not looking good. No Gas mode has high Doubly Charged Ratio 2.897%. I did maintenance 2 days ago due to K and Ni contamination, so I was wondering if could be after that. (I conditioned the cones).

Also, in the second page, He mode has no peak height for mass 59 and the peak looks terrible! Could this be contamination in the system? I washed the spray chamber, cleaned the sampling cone and changed the Ni Skimmer Cone. 

Thank you so much for your help!

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