REMOVABLE CASSETTE FOR AN APPARATUS FOR SAMPLING NANOPARTICLES PRESENT IN AN AEROSOL, AND FILTRATION ASSEMBLY FOR SUCH A CASSETTE

摘要

A filtration assembly including an annular support which includes an annular step having an apex on which a filter membrane rests, and a cover covering the annular support for maintaining a periphery of the membrane between the cover and the annular support. According to the invention, the cover comprises a ring threaded around the step to clamp the periphery of the membrane between the ring and the annular support, the ring being extended by a skirt which projects from the ring to cover an outer peripheral wall of the annular support and to present an end face which extends continuously from a bearing face of the annular support. The skirt facilitates the sealing of the cassette and the handling of the filtration assembly. The invention also relates to a removable cassette for an apparatus for collecting nanoparticles comprising such a filtration assembly.