**6. Final remarks**

The laser beam, in the LmPy system, is focused on smaller areas (than 100 μm) due to the use of focusing lenses. This makes it possible to analyze individual microscopic particles among a wide variety of small components in complex mixtures. The short duration of the laser beam enables the thermal cleavage of single particles or even macromolecules, using a huge amount of energy. This thermal interaction between the laser and matter triggers a sequence of pyrolysis reactions releasing compounds that, in turn, are examined by GC/MSMS.
