Cleaning ICP MS 7900

Question

Hello, for me the ICP MS is new territory. 
 I have a 2 question. 
 1. How do I rinse the ICP MS System with 5% nitric acid? Should I simply add the 5% nitric acid to the sample list before measuring? 
 2. Furthermore, if my boron level is above my limit (as a control). Gives a special cleaning procedure. How do I do this? Where can I find it? 
 
 Thank you in advance and have a nice Day.

icpmsguy2k · Accepted Answer

1) at the start of the day you insert the carrier solution and internal standard tubes into a bottle of 5%, and just let it run for a few minutes. Turn up the peri pump speed to help. 
 2) I don't have an answer for this. I'm not sure what you're asking

Tom Herzog · Answer

Here is the Boron rinse solution. 
 0.5g EDTA (as the acid not Na salt) 0.2g Triton X-100 15g NH4OH 20g H2O2 & make up to 250 mL with water. Dilute 1:10 in DI water for the final rinse solution. 
 Are you using the inert sample introduction parts? Boron is in all the glass/quartz sample introduction pieces and will leach out while you run. Depending on how low you want to see B, you may need to switch to inert sample intro.

Tom Herzog · Answer

This solution will be in one of the big 250 mL bottles in the middle rack. You will set it up in the Batch on Sample introduction tab on MassHunter version 5.X or on the Peripump/ISIS tab in MassHunter 4.X. Set up as Rinse 1, or Rinse 2 depending on weither you have other Rinses already setup. Set a rinse time, set speed to 0.3rps, and tell it the position you put it into. 
 Upload a picture of your current table and I can be more specific.

Cleaning ICP MS 7900

Top Replies