US 2020/0393379 A1Published application

Method and apparatus for determining a concentration of a substance in a liquid medium

AssigneeBräNnströM Gruppen AB

InventorRoland BRÄNNSTRÖM

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Abstract

Disclosed is an apparatus for determining a concentration of a substance in a liquid medium of a test sample. The apparatus comprises a light source for directing a light beam of a first wavelength range towards the test sample, and a first detector for measuring intensity of irradiation emitted from the liquid medium at a second wavelength characteristic for the liquid medium . The apparatus further comprising a second detector for measuring intensity of irradiation emitted from the substance at a third wavelength characteristic for the substance, and a determining unit for determining the concentration of the substance in the liquid medium based on the measured intensities of the irradiation collected at the second wavelength and at the third wavelength. Further, the apparatus is arranged such that the irradiation collected by the first detector is emitted from a first surface area of the test sample and the irradiation collected by the second detector is emitted from a second surface area, which first and second areas are at least partly covered by a surface area of the test sample illuminated by the light beam of the light source.

Claims16

Dependent claims

An apparatus for determining a concentration of a substance in a liquid medium of a test sample, the apparatus comprising:

a light source for directing a light beam of a first wavelength range towards the test sample;
a first detector for collecting irradiation emitted from the liquid medium of the test sample as a result of the light beam directed towards the test sample, the irradiation being collected at one or more second wavelengths that are characteristic for the liquid medium, and for measuring an intensity of the irradiation collected at the one or more second wavelengths;
a second detector for collecting irradiation emitted from the substance of the test sample as a result of the light beam directed towards the test sample, the irradiation being collected at one or more third wavelengths that are characteristic for the substance, and for measuring an intensity of the irradiation collected at the one or more third wavelengths, and a determining unit for determining the concentration of the substance in the liquid medium of the test sample based on the measured intensity of the irradiation collected at the one or more third wavelengths and the measured intensity of the irradiation collected at the one or more second wavelengths, the apparatus arranged such that the irradiation collected by the first detector is emitted from a first surface area of the test sample and the irradiation collected by the second detector is emitted from a second surface area of the test sample, which first surface area and second surface area are at least partly covered by a surface area of the test sample illuminated by the light beam of the light source.

A method for determining a concentration of a substance in a liquid medium of a test sample, the method comprising:

directing a light beam of a first wavelength range towards the test sample;
collecting irradiation emitted from the liquid medium of the test sample as a result of the light beam directed towards the test sample, the irradiation being collected at one or more second wavelengths that are characteristic for the liquid medium;
measuring an intensity of the irradiation collected at the one or more second wavelengths;
collecting irradiation emitted from the substance of the test sample as a result of the light beam directed towards the test sample, the irradiation being collected at one or more third wavelengths that are characteristic for the substance;
measuring an intensity of the irradiation collected at the one or more third wavelengths, determining the concentration of the substance in the liquid medium of the test sample based on the measured intensity of the irradiation collected at the one or more third wavelengths and the measured intensity of the irradiation collected at the one or more second wavelengths, the method being wherein the irradiation collected at the one or more second wavelengths is emitted from a first surface area of the test sample and the irradiation collected at the one or more third wavelengths is emitted from a second surface area of the test sample, which first surface area and second surface area are at least partly covered by a surface area of the test sample illuminated by the light beam of the light source.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/305,453Filed 31 May 2017
Priority: SE 1650784-03 Jun 2016
Published: 17 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G01N 21/65
Optically excited: raman scattering
G01N 21/64
Optically excited: fluorescence; Phosphorescence
G01N 21/645
Fluorescence; Phosphorescence: specially adapted constructive features of fluorimeters
G01N 21/85
Systems specially adapted for particular applications: investigating moving fluids or granular solids

Family

US 10,948,416 B2Related patent
US 2020/0393379 A1This patent

From the US filing history. Foreign family members aren’t listed.

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