Gas concentration prediction method

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.