US 12,298,232 B2
Analysis device, program for analysis device, and analysis method
Kyoji Shibuya, Kyoto (JP)
Assigned to Horiba, Ltd., (JP)
Appl. No. 17/928,388
Filed by HORIBA, LTD., Kyoto (JP)
PCT Filed May 25, 2021, PCT No. PCT/JP2021/019833
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2021/241589, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 2020-094709 (JP), filed on May 29, 2020.
Prior Publication US 2023/0204498 A1, Jun. 29, 2023
Int. Cl. G01N 21/31 (2006.01); G01N 33/00 (2006.01)
CPC G01N 21/31 (2013.01) [G01N 33/0027 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An analysis device that analyzes a target component included in a sample including one or more interference components, the analysis device comprising:
a light source that irradiates the sample with reference light;
a photodetector that detects an intensity of sample light that is the reference light having transmitted through the sample;
a parameter determining unit that determines a parameter representing a change in a light absorption spectrum of the target component or a change in a light absorption spectrum of an interference component, the change being caused by a coexisting component included in the sample or by a wavelength shift of the reference light;
a concentration calculating unit that calculates a corrected concentration of the target component, from an intensity-related signal related to the intensity of the sample light, by using the parameter representing the change in the light absorption spectrum;
a correlation value calculating unit that calculates a correlation value between the intensity-related signal related to the intensity of the sample light and a predetermined feature signal, and that calculates a plurality of correlation values using a number of feature signals equal to or more than a sum of a number of types of the target component and a number of types of the interference component; and
a storage unit that stores a sole correlation value that is a correlation value between a per unit concentration of the target component and a per unit concentration of each of the one or more interference components, the sole correlation value being obtained from the intensity-related signal when only the corresponding interference component exists with the target component, and from the number of feature signals, wherein
the concentration calculating unit calculates a corrected concentration of the target component, the corrected concentration being corrected for a coexistent effect of the coexisting component or for the wavelength shift of the reference light, using a plurality of correlation values obtained by the correlation value calculating unit, a plurality of the sole correlation values, and the parameter representing the change in the light absorption spectrum of the target component or the changes in the one or more interference components.