Double beam photometer for measuring fluid samples

Details Double beam photometer for measuring fluid samples Double beam photometer for measuring fluid samples

1983-05-10

1984-08-28

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

Fluid color transmission examination

356435, G01N 2185

Patent

active

044681240

ABSTRACT:
A double beam photometric flow cell for high pressure liquid chromatography having illuminated sample and reference passageways therein, the sample passageway receiving flowing fluid sample fractions for analysis. Regulating apertures control the relative amount of light passed through the passageways such that the light energy through the reference passageway exceeds that through the sample passageway. This reduces the contribution of the reference path to "shot noise" in the photometer output signal.

REFERENCES:
patent: 3538337 (1970-11-01), Hrdina

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