TOTAL CONCENTRATION MEASUREMENT METHOD FOR OXIDIZING SUBSTANCE, CONCENTRATION METER FOR MEASURING TOTAL CONCENTRATION OF OXIDIZING SUBSTANCE, AND SULFURIC ACID ELECTROLYTIC APPARATUS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a total concentration measurement method for an oxidizing substance capable of obtaining a total concentration by one measurement with a simple operation even for evaluation liquid containing multiple components such as persulfuric acid, persulfate and hydrogen peroxide, a simple and inexpensive concentration meter for measuring the total concentration of the oxidizing substance, and a sulfuric acid electrolytic apparatus using the concentration meter.

SOLUTION: The total concentration measurement method for an oxidizing substance is for measuring the total concentration of the oxidizing substance in the evaluation liquid containing at least one kind of the oxidizing substance. The total concentration measurement method for an oxidizing substance includes at least: an electrolysis step of reducing the oxidizing substance in the evaluation liquid using an electrolytic cell; a coulomb amount calculation step of calculating a total coulomb amount by a reduced current value from an electrolysis start time to a prescribed electrolysis stop time; and a concentration calculation step of calculating the total concentration of the oxidizing substance by the total coulomb amount calculated in the coulomb amount calculation step.

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