04306877 is referenced by 56 patents and cites 4 patents.

The concentration of a substance of interest is measured by exposing a peable-membrane face of an indicator chamber containing an indicator to the substance, monochromator radiation being incident upon the indicator through a transparent wall of the indicator chamber, the exiting radiation being received by a light-metering unit for ascertainment of the effect upon the indicator's absorbence of fluorescence of the substance of interest. The indicator substance is additionally exposed to a reference substance of known concentration which is permitted to engage the indicator substance by diffusion through such permeable membrane, in order that the indicator be calibrated.

Title
Optical measurement of concentration
Application Number
6/59680
Publication Number
4306877
Application Date
July 23, 1979
Publication Date
December 22, 1981
Inventor
Dietrich W Lubbers
Dortmund
DE
Agent
Michael J Striker
Assignee
Max Planck Gesellschaft zur Forderung der Wissenschaften e V
DE
IPC
G01N 33/48
G01N 21/80
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