Observation I’/I value Example of collisional process
Signal enhancement >1 Increase of ground state, e.g. suppression of ionization; Increase in excited state, e.g., ion-electron collisional radiative recombination.
Signal depression <1 Depopulation of ground state, e.g. charge transfer reactions; Depopulation of excited state, e.g., collisional de-excitation
No effect on signal 1 No change in the populations of the ground and excited states of analyte atoms
Table 1: Matrix interference effects and corresponding I’/I values expected during atomic emission spectrometry.
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