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 (https://doi.org/10.1351/pac199264020261)