US 12,000,819 B2
Gas concentration prediction method
Ikumi Ikejima, Osaka (JP); Hiroshi Matsumoto, Osaka (JP); and Kohei Sawada, Tokyo (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP); and THE UNIVERSITY OF TOKYO, Tokyo (JP)
Appl. No. 17/261,212
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP); and THE UNIVERSITY OF TOKYO, Tokyo (JP)
PCT Filed Jul. 25, 2019, PCT No. PCT/JP2019/029140
§ 371(c)(1), (2) Date Jan. 19, 2021,
PCT Pub. No. WO2020/022413, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 2018-139560 (JP), filed on Jul. 25, 2018.
Prior Publication US 2021/0285926 A1, Sep. 16, 2021
Int. Cl. G01N 33/18 (2006.01); G01N 30/02 (2006.01)
CPC G01N 33/1826 (2013.01) [G01N 30/02 (2013.01); G01N 2030/025 (2013.01)] 3 Claims
 
1. A gas concentration prediction method comprising:
step 1 of exposing a gas to a specimen A comprising a liquid containing a compound, and to a specimen B comprising a liquid containing the same compound in a concentration lower than the concentration of the compound in the specimen A, under the same conditions X,
wherein if the specimen A contains other components in addition to the gas and the compound, the specimen B contains the same components at the same concentrations as the specimen A;
step 2 of measuring a gas concentration a in the specimen A obtained in step 1, and a gas concentration b in the specimen B obtained in step 1, to obtain a coefficient α by calculating the relationship between a and b based on the calculation equation α=a/b;
step 3 of exposing, under conditions Y, the gas to a specimen B′ containing the same compound in the same concentration as the specimen B;
step 4 of measuring a gas concentration b′ in the specimen B′ obtained in step 3; and
step 5 of predicting, based on the gas concentration b′ and the coefficient α, a gas concentration a′ in a specimen A′ obtained when the gas is exposed to the specimen A′ under the conditions Y according to the formula a′=ab′,
wherein specimen A′ contains the same compound in a concentration within the ±1 mass % range of error of the concentration as the specimen A, and
wherein if the specimen B′ contains other components in addition to the gas and the compound, the specimen A′ contains the same components at the same concentrations as the specimen B′, and
wherein the concentrations of the compound in specimen A, B, A′ and B′ are known.