Performance Report

Question

Hello all, 
 I would like your opinion and experience in ICP-MS, what is the causes that the sensibility is so different in different days? 
 It needs to be more than, 1000/1500/7500 righ t?? 
 
 I dont change the argon cilinder

CGS · Answer

Hello julia.jsd 
 
 Which is the model ?7900 maybe? The specifications en No gas Mode for 7900 is 7Li>3000 cts, 89Y 15000and 205 Tl> 9000 cts 
 Sensitivity can change for multiple reason: vacuum, sample introductions, tune solution, cones..... 
 My first suggestions will be change the cones 
 
 Thanks 
 Regards