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Cesium as Ionization Buffer

We currently have an outstanding order for basf 100-103. It has been recommended to use a cesium ionization buffer for the alkali Na/K for these matrices. Can someone explain how one might use such a buffer in this instance? I'm not familiar with its use. Should it be added to the standard?


ICP-OES is an optical thin emitter in the radial view mode but axial view is an emitter of over 1 cm in length. The effect of the electron density is therefore (to a lesser extent) acting as in Flame atomic absorption. The role of the Cs is to supply an abundance of electrons in the emission area thereby buffering the effect of other electron sources such as that of Na on K or vice versa.

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Paul R. Gaines, Ph.D.
CEO of Inorganic Ventures & Fellow Chemist

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