Apparatus and method for analyzing particles in a medium

Details Apparatus and method for analyzing particles in a medium Apparatus and method for analyzing particles in a medium

1986-08-01

1988-02-02

Rosenberger, R. A.

Optics: measuring and testing

For size of particles

By particle light scattering

356432, 356441, G01N 2101

Patent

active

047226021

ABSTRACT:
A medium including particles to be analyzed is contained in a cell through which excitation rays are passed. The excitation rays are focused and have a predetermined wave form. A period in time of the excitation rays is set substantially equal to and preferably longer than the attenuation time of an acoustic pulse which is generated when the excitation rays are absorbed in the particle and when the particle release heat. The acoustic pulse is used to analyze particle size and number of particles.

REFERENCES:
patent: 4277179 (1981-07-01), Bruce
patent: 4413504 (1983-11-01), Voigtman et al.
Oda et al, "Analysis & Turbid Solutions by Laser-Induced Photoacoustic Spectroscopy" Analytical Chemistry vol. 52, (1980) pp. 650-653.

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