Cesium buffer helps in determining easily ionizable elements in ICP-MS and ICP-OES. But how? Cesium is easily ionizable element it produces more electrons in the plasma. In principle it should also suppress the ionization of metal of our interest. In that case Cesium buffers interferes our analysis. I don’t understand why Cesium helps to reduce the ionization of sodium and potassium, not the ionization of metal of our interest. Can you please explain how cesium helps to reduce the ionization of only a specific metal not the metal of interest?

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter16: Solubility And Precipitation Equilibria
Section: Chapter Questions
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Cesium buffer helps in determining easily ionizable elements in ICP-MS and ICP-OES. But how? Cesium is easily ionizable element it produces more electrons in the plasma. In principle it should also suppress the ionization of metal of our interest. In that case Cesium buffers interferes our analysis. I don’t understand why Cesium helps to reduce the ionization of sodium and potassium, not the ionization of metal of our interest. Can you please explain how cesium helps to reduce the ionization of only a specific metal not the metal of interest?
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