Method and apparatus for measuring immunological reaction with t

Optics: measuring and testing – By particle light scattering – With photocell detection

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250574, 356246, 356341, 422 64, 422 73, 436164, G01N 2151, G01N 33557, G01N 3502

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048263192

ABSTRACT:
A coherent laser light flux is projected into a cell made of transparent quartz and light scattered from particles suspended in an antigen-antibody reaction liquid contained in the cell is detected by a photomultiplier by means of a collimator. An output electrical signal from the photomultiplier is sampled at different time instances and samplings are supplied to a fast Fourier transformer to derive a plurality of power spectrum desnities of fluctuation in intensity of the scattered light. A plurality of power spectrum densities are averaged to generate a mean power spectrum density. An amount of antigen contained in the reaction liquid is measured in accordance with the mean power spectrum density.

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