Hello, nice to meet you all!
I need to analyse boron at around 4 ppb in drinking water matrix by Agilent ICP-MS 7500ce. This machine was used to test boron at hundreds ppb levels before, but there is no available data for background boron. When I checked for background, cps for boron in 2% HNO3 is ~ 90K. I wonder if this is the 'normal' boron background, and anyway to eliminate it?
Some B-contamination sources that I suspected are spray chamber, torch (quartz), and the glass bottle containing supra pur HNO3 65%. Does it make sense, or are there other contamination sources?
For a 2% HNO3 solution (blank), the boron cps appeared in the tunning window (~100K) was much lower than which appeared in the acquired sequence (~600K) with the same operational and acquisition parameters. Any explaination for this?
I greatly appreaciate for you response. I am stucked!!!