QUALITATIVE AND QUANTITATIVE ANALYZING METHOD OF INORGANIC SALT AND ANALYZER OF INORGANIC SALT

摘要

PROBLEM TO BE SOLVED: To provide an analyzing method which enables the qualitative and quantitative analysis of an inorganic salt in an aqueous solution and the inorganic salt in ice of a frozen state in a non-destructive manner, and an analyzer of the inorganic salt.

SOLUTION: The frozen aqueous solution containing the inorganic salt is used as a sample to be analyzed and the sample to be analyzed is irradiated with an electromagnetic wave 42 of 0.1-10 THz. An absorption characteristic spectrum obtained by measuring the electromagnetic wave 44 transmitted through the sample to be analyzed is compared with a standard characteristic spectrum obtained by measuring the electromagnetic wave 44 transmitted through a standard sample, which is obtained by freezing an aqueous solution containing the known inorganic salt in known concentration and irradiated with the electromagnetic wave 42 of 0.1-10 THz, to extract a standard absorption spectrum coinciding with the absorption characteristic spectrum in peak position and a coefficient becoming minimum in the error between a theoretical absorption characteristic spectrum obtained from the product of the extracted standard absorption spectrum and the coefficient, and the absorption characteristic spectrum is calculated.

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