METHOD FOR DETERMINING SPECTRUM OF SIZES OF SUSPENDED NANOPARTICLES Russian patent published in 2015 - IPC G01N15/02 B82Y35/00 

FIELD: measurement equipment.

SUBSTANCE: method for determining a range of sizes of suspended nanoparticles consists in passage of gas (mixture of gases) containing analysed particles, through diffusion batteries of a meshed type and their introduction to supersaturated vapours of a low-volatile enlarging substance. Then, lighting of a flux of particles with a light beam and recording of parameters of light signals shaped by enlarged particles at their flying through the pointed-out area of the flux is performed. In order to improve accuracy of determination of the range of sizes, the main flux is separated into six parallel fluxes. With that, five of them are passed through five diffusion batteries with a different slip, and one of them is passed directly. Then, these fluxes pass through six devices of condensation growth and then to a field of vision of a charge-coupled device matrix and the obtained six areas of images of enlarged fluxes of particles are transmitted to a computer for an analysis of their range of sizes. Unlike known ones, the method allows performing simultaneous processing by means of a computer of six images of enlarged particles, which characterise different dimensional ranges of nanoparticles.

EFFECT: reducing the time required for measurements and improving their accuracy.

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