SENSORS AND SUBSTANCES FOR DETECTING PARTICLES IN AIR

摘要

A cyclone separator (1) is connected to supply a buffer solution (15) with captured atmospheric particles to an optical sensor (2) having antibody regions (26) coated on the upper surface (21) of a prism (22). The buffer solution (15) contains a polyionic cation such as poly-L- lysine, DEAE-dextran or polyethyleneimine, which is effective to reduce non-specific binding to the antibody regions (26). A light source (27) illuminates the underside of the prism surface (21). The illuminated antibody regions (26) are viewed from above by a detector (29) or microscope.