Cyclic colorimetry method and apparatus

Details Cyclic colorimetry method and apparatus Cyclic colorimetry method and apparatus

1975-09-15

1976-11-16

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

23230R, 23253R, 250565, 250573, 356205, G01J 350

Patent

active

039921093

ABSTRACT:
A process of and apparatus for colorimetry, whereby an indicator is added cyclically to a fluid stream to indicate the presence or absence of a condition in the stream. The presence of the condition may be indicated by the formation of a precipitate, a change of color, etc. A light source and photocell are located downstream of the point of addition of the indicator and by the difference in an optical characteristic such as the transmissivity or scattering of the fluid, at one or more wavelengths, due to the introduction of the indicator, a measure is obtained of the degree to which the tested-for condition is present in the fluid.

REFERENCES:
patent: 1977359 (1934-10-01), Styer
patent: 2389046 (1945-11-01), Hare
patent: 3089382 (1963-05-01), Hecht et al.
patent: 3549262 (1970-12-01), Hozumi
patent: 3643102 (1972-02-01), Harper et al.
patent: 3708265 (1973-01-01), Lyshkow
patent: 3729263 (1973-04-01), Engholdt
patent: 3748044 (1973-07-01), Liston

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