Patent ID: 11953437
Assignee: ENDRESS+HAUSER OPTICAL ANALYSIS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A method for verifying a measured second analyte concentration in a measuring medium, the method comprising:
providing a device comprising:
a sample cell adapted to receive the measuring medium;
a first light source unit configured to emit a first light at a first wavelength and a fourth light at a second wavelength different from the first wavelength into the sample cell;
a first detector unit configured to detect the first light and the fourth light exiting the sample cell;
a functional element disposed within the sample cell such that the functional element is in contact with the measuring medium;
a second light source unit configured to emit a second light onto the functional element, wherein the functional element comprises luminophores adapted to emit a third light upon stimulation by the second light, the third light dependent on a presence of a second analyte in the measuring medium;
a second detector unit configured to detect the third light from the functional element; and
a control unit configured to operate on the detected first light, third light and fourth light;

emitting the fourth light using the first light source unit into the sample cell;
detecting the fourth light exiting the sample cell by the first detector unit;
evaluating the detected fourth light using the control unit to determine a third value representing the second analyte concentration in the measuring medium;
emitting the second light from the second light source unit onto the functional element such that the luminophores are stimulated by the second light to emit the third light;
detecting the third light from the functional element using the second detector unit;
evaluating the detected third light by the control unit to determine a second value representing the second analyte concentration in the measuring medium;
comparing the third value and the second value; and
outputting information about the reliability of the third value based on the comparing.