Hi, we have an ICP-MS 8900, and we'll work with NH3-He (10-90%) in the cell reaction. I read in the manual about the general precaution that should be taken to prevent the dangers and effects of Ammonia gas. Since we will use this gas a couple of times monthly, I would like to know if it is necessary to purge the cell gas lines after using NH3-He mix on the 3er Cell gas and how to do that. How to be sure the ammonia does not remain in the vacuum system after ICP-MS shutdown or power failure?
