Cart

Chemical Stability and Compatibility - Antimony count unstable in ICP-OES

 
Instrument: ICP-OES Wavelength: Sb206.834 and Sb217.582 Product: CGSB1-125ml LOT# N2-SB665459 and P2-SB676727 the intensity of 1 and 10ppm Antimony solution from IV increased gradually when repeat injection from same solution. others element are fine. Inorganic Ventures 10ppm in Matrix is 0.07N + 0.8%HNO3 Inorganic Ventures 1ppm in Matrix is 0.07N + 0.08%HNO3 LOT# N2-SB665459 Trial 1: 2256 Trial 2: 2415 Trial 3: 2633 Trial 4: 2858 Trial 5: 3070 Trial 6: 3260 Trial 7: 3376 Trial 8: 3520 LOT# P2-SB676727 Trial 1: 2525 Trial 2: 2826 Trial 3: 3035 Trial 4: 3262 Trial 5: 3394 Trial 6: 3496 Trial 7: 3564 Trial 8: 3605
Sort By    Oldest  |  Newest
Responses
Forrest Butler Total posts: 2

Thank you very much for the information and explanation. Sometimes I have difficulties with completing various tasks in chemistry, for example, now I have an assignment from my teacher to write an essay. In order to write a high-quality essay, I went to the site https://edubirdie.com/blog/essay-guide and read a very useful blog article about what an essay should consist of, what basic structural elements should be there. I hope I will succeed.

Posted: 09/15/21 06:04:15
Brian Alexander, PhD Total posts: 18

Thank you for the detailed information. Since the amount of Sb in the solution is not increasing you are probably observing memory effects, which we have observed as well for Sb during ICP analyses. Our experience has been that Sb frequently 'sticks' to the peristaltic pump tubing, so one option is to change that and see if it helps. Alternatively, trace amounts of HF (~0.2% v/v) added to the rinse solution are effective at reducing memory effects for Sb, and HF concentrations at that level are generally not damaging to glass ICP sample introduction systems (though we would recommend additional rinses without HF and close observation of Si background levels).

Posted: 02/25/20 08:42:15

3 Item(s)

Show per page