US 12,111,254 B2
Sample analyzing apparatus
Takahito Inoue, Kyoto (JP); Hiroshi Uchihara, Kyoto (JP); and Kyoji Shibuya, Kyoto (JP)
Assigned to HORIBA, LTD., Kyoto (JP)
Appl. No. 17/611,471
Filed by HORIBA, Ltd., Kyoto (JP)
PCT Filed May 12, 2020, PCT No. PCT/JP2020/018928
§ 371(c)(1), (2) Date Nov. 15, 2021,
PCT Pub. No. WO2020/230775, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 2019-092441 (JP), filed on May 15, 2019.
Prior Publication US 2022/0244176 A1, Aug. 4, 2022
Int. Cl. G01N 21/39 (2006.01); G01J 3/433 (2006.01); G01N 1/44 (2006.01); G01N 21/3504 (2014.01); G01N 21/31 (2006.01); G01N 21/3518 (2014.01)
CPC G01N 21/39 (2013.01) [G01J 3/4338 (2013.01); G01N 21/3504 (2013.01); G01N 1/44 (2013.01); G01N 2021/3129 (2013.01); G01N 21/3518 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A sample analyzing apparatus comprising
a heating furnace that heats a sample held by a sample holding body that holds the sample, and
a gas analysis section that analyzes a target component to be measured contained in a gas containing at least one interference component produced by heating the sample, wherein
the gas analysis section comprises
a laser light source that emits a modulated light whose wavelength is modulated at a predetermined modulation frequency and around a peak of an absorption spectrum of the target component to be measured,
a photodetector that detects an intensity of a sample light as being the modulated light that has transmitted through the gas,
a correlation value calculation section that calculates correlation values between intensity related signals that relate to the intensity of the modulated light detected by the photodetector and a plurality of feature signals from which a predetermined correlation with the intensity related signals is able to be obtained,
a concentration calculation section that calculates concentrations of the target component in the gas produced by heating the sample using the correlation values obtained by the correlation value calculation section, and
a storage section that stores individual correlation values, which are respective correlation values per unit concentration for the target component and for each of a plurality of interference components determined from the respective intensity related signals and the plurality of feature signals, for a case in which the target component and the each of the plurality of interference components are present individually,
wherein the concentration calculation section calculates concentrations of the target component in the gas produced by heating the sample based on sample correlation values, which are obtained by the correlation value calculation portion during analysis of the gas produced by heating the sample, and on the individual correlation values of the target component and the at least one interference component stored in the storage portion.