US 12,436,105 B2
Water quality analysis system, sensor module, calibration machine, and method for calibrating water quality analysis system
Kiichiro Tomioka, Kyoto (JP); and Yuta Hashima, Kyoto (JP)
Assigned to HORIBA Advanced Techno, Co., Ltd., Kyoto (JP)
Appl. No. 17/595,348
Filed by HORIBA Advanced Techno, Co., Ltd., Kyoto (JP)
PCT Filed Mar. 17, 2020, PCT No. PCT/JP2020/011722
§ 371(c)(1), (2) Date Nov. 15, 2021,
PCT Pub. No. WO2020/235198, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-095724 (JP), filed on May 22, 2019.
Prior Publication US 2022/0221404 A1, Jul. 14, 2022
Int. Cl. G01N 21/64 (2006.01); G01N 21/27 (2006.01); G01N 33/18 (2006.01)
CPC G01N 21/6428 (2013.01) [G01N 21/276 (2013.01); G01N 33/18 (2013.01); G01N 2021/6417 (2013.01); G01N 2021/6463 (2013.01); G01N 2021/6497 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A water quality analysis system that measures a concentration of a component contained in a liquid sample by a fluorescence spectroscopy, comprising
a light irradiation section that irradiates the liquid sample with a light having an excitation wavelength of the component,
a light detection section that detects fluorescence of the component-to be measured emitted from the liquid sample,
a sensor head that houses the light irradiation section and the light detection section, and that is immersed in the liquid sample,
a calculation unit that calculates a concentration of the component by using a fluorescence intensity obtained by the light detection section, and
a fluorescence reference member that is arranged on an optical path between the light irradiation section and the light detection section during calibration of the water quality analysis system, wherein
the fluorescence reference member is detachably mounted on the sensor head,
the fluorescence reference member emits fluorescence upon excitation by the light irradiation section, and
the fluorescence reference member is solid, non-toxic, and not subject to photodegradation.