Term: additivity
https://doi.org/10.1351/goldbook.A00136

Definition:
The process by which each chemical species present in the ion source at a certain partial pressure makes a contribution to the total mass spectrum which is the same as that which it would give if that chemical species alone were present in the ion source at a pressure equal to this certain partial pressure.

Related Terms:
1) partial pressure (http://doi.org/10.1351/goldbook.P04420).
2) mass spectrum (http://doi.org/10.1351/goldbook.M03749).

Source: Orange Book, 2nd ed., p. 206 (https://media.iupac.org/publications/analytical_compendium/)

Citation: 'additivity' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.A00136

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