Laser nephelometric system

Details Laser nephelometric system Laser nephelometric system

1981-09-22

1983-10-11

Corbin, John K.

Optics: measuring and testing

By particle light scattering

With photocell detection

250574, 364525, G01N 2100

Patent

active

044088809

ABSTRACT:
A laser nephelometric system measures the concentration of various substances in a solution particularly in blood or serum. The system receives a number of data elements each indicative of the intensity of light scattered from the solution at its sampling time. These data elements are processed in accordance with a statistical analysis. Based upon the fact that the relative variation of the scattered light intensity increases as the scattered light decreases, a first screening of data elements is performed so that the band of selection for data elements accords with the above fact. Further a second screening of data elements is performed in order to reduce the effect of the unnecessary light resulting from the other reflecting objects, such as dust, air bubbles and other substances. The average of the screened data elements provides an accurate value of the intensity of scattered light due to the substances to be measured, i.e. measurand.

REFERENCES:
patent: 3807630 (1974-04-01), Stewart
patent: 3967901 (1976-07-01), Rodriguez
patent: 4015135 (1977-03-01), Tipton, Jr.
patent: 4110044 (1978-08-01), Pettersson et al.
patent: 4140395 (1979-02-01), Kreikebaum

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