US 12,332,209 B2
Electrolyte analysis device
Hutami Rahayu Rahma, Tokyo (JP); and Masafumi Miyake, Tokyo (JP)
Assigned to Hitachi High-Tech Corporation, Tokyo (JP)
Appl. No. 17/795,610
Filed by Hitachi High-Tech Corporation, Tokyo (JP)
PCT Filed Jan. 13, 2021, PCT No. PCT/JP2021/000764
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2021/161704, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2020-023832 (JP), filed on Feb. 14, 2020.
Prior Publication US 2023/0075119 A1, Mar. 9, 2023
Int. Cl. G01N 27/333 (2006.01); G01N 27/30 (2006.01); G01N 27/416 (2006.01); G01N 33/18 (2006.01)
CPC G01N 27/333 (2013.01) [G01N 27/301 (2013.01); G01N 27/4166 (2013.01); G01N 33/18 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electrolyte analysis device that measures a concentration of a specific ion in a sample using a plurality of ion selective electrodes and a reference electrode, the electrolyte analysis device comprising:
a water supply tank configured to store a diluent used for at least one of solution sending, probe cleaning, and temperature adjustment in the electrolyte analysis device;
a specimen dispensing device configured to dispense a sample to be measured;
a dilution tank configured to dilute the sample dispensed by the specimen dispensing device with the diluent;
a water quality measurement unit configured to measure an ion concentration of the diluent in the water supply tank, which is an electrolyte analysis unit including the plurality of ion selective electrodes and the reference electrode; and
a control device configured to control the electrolyte analysis device, wherein
in the measurement of the specific ion in the sample, the control device is configured to dilute a reference electrode solution in contact with measuring the reference electrode to a plurality of concentrations with the diluent, and perform water quality determination processing to determine whether a water quality of the diluent is normal or abnormal based on a slope at a lower concentration of the reference electrode solution than a standard solution, which are determined from measurement results.