Centre National De La Recherche Scientifique

Paris Sciences Et Lettres

Olivier Lesage

Frédéric Prima

Daniel Morvan

Jonathan Cramer

Frédéric Rousseau

The invention relates to a process for selectively and continuously extracting a series of desired species from a matrix, comprising the steps of:&#x2014;injecting a plasma () in an extraction chamber by means of a plasma torch,&#x2014;continuously monitoring () the excited elements extracted from the matrix and contained in the plasma by optical emission spectroscopy, and for each species of the series,&#x2014;setting a distance () between the support and the plasma torch, and the composition of the injected plasma as a function of the monitored excited elements so that only one desired species of the series of species is being extracted from the matrix under molecular form, and&#x2014;providing () a plate in the extraction chamber, exterior to the plasma, causing collection of molecules comprising said desired species by deposition onto the surface of the plate.

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Vitry-sur-Seine, France

Olivier Lesage