Heavy metals impact at plants using photoacoustic spectroscopy technology with tunable CO2 laser in the quantification of gaseous molecules

In the same time, the investigations presented in this paper showed that the photoacoustic technology with tunable CO2 laser, in the quantification of gaseous molecules, was able also to distinguish between seeds/grains germinated with HM and seeds/grains germinated with distilled water and can play an important role in testing the contaminated biological samples.