The repercussions of introducting chlorinated and fluorinated molecules int
o natural wet air plasmas are analysed The study deals with the multiple as
pects of plasma composition and of modification of the intensity and shape
of the spectra emitted by the main chemical species. Some rapid methods, la
rgely insensitive to halogenic compounds and water concentrations were prop
ounded for temperature determination. The effects of radiative and thermal
non-equilibrium were considered.