Device and method for measuring multiple analyte concentrations in a measuring medium
AssigneeEndress+Hauser Optical Analysis, Inc.
InventorsMarc Winter, Xiang Liu, Thomas Wilhelm
Life of this patent
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Abstract
The present disclosure relates to a device for measuring a first analyte concentration and a second analyte concentration in a measuring medium, the device including: a sample cell; a first light source unit; a first detector unit; a functional element; a second light source unit; a second detector unit; and a control unit adapted to analyze a detected first light for determining a first value representing the concentration of the first analyte in the measuring medium and adapted to analyze a detected third light for determining a second value representing the concentration of the second analyte in the measuring medium. A method of using the device is also disclosed.
Claims19
A method for measuring a first analyte concentration and a 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;
- a first detector unit configured to detect the first light and the fourth light;
- 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, wherein the functional element comprises luminophores adapted to emit a third light upon stimulation by the second light, the third light depending on a presence of the 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 first light from the first light source unit into the sample cell;
- detecting the first light exiting the sample cell using the first detector unit;
- evaluating the detected first light using the control unit to determine a first value representing the first 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 using the control unit to determine a second value representing the second analyte concentration in the measuring medium;
- emitting the fourth light from the first light source unit into the sample cell;
- detecting the fourth light exiting the sample cell using 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;
- comparing the second value and the third value using the control unit;
- and
- signaling a status of the device using the control unit based on the comparing of the second value and the third value.
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.
Dependencies are inferred from the claim text.