chemical vapour generation

in spectrochemical analysis
https://doi.org/10.1351/goldbook.C01040
A system in which the analyte is separated from the sample matrix by the generation of gaseous species as a result of a chemical reaction.
Source:
PAC, 1992, 64, 261. (Nomenclature, symbols, units and their usage in spectrochemical analysis - XIII. Terms related to chemical vapour generation (IUPAC Recommendations 1992)) on page 262 [Terms] [Paper]