METHOD FOR MEASURING TOTAL CONCENTRATION OF ACIDIC SUBSTANCES, CONCENTRATION METER FOR MEASURING TOTAL CONCENTRATION OF ACIDIC SUBSTANCES, AND SULFURIC ACID ELECTROLYSIS DEVICE EQUIPPED WITH SAME

摘要

Provided are: a method for measuring the total concentration of acidic substances, which can measure the total concentration even in an evaluation solution (i.e., a solution to be evaluated) containing multiple components such as persulfuric acid, a persulfuric acid salt and hydrogen peroxide in a single measurement by a simple procedure; a concentration meter for measuring the total concentration of acidic substances, which has a simple structure and is inexpensive; and a sulfuric acid electrolysis device equipped with the concentration meter.A method for measuring the total concentration of acidic substances in an evaluation solution containing one or more acidic substances. The method comprises at least: a heat treatment step of treating the evaluation solution by heating at 50-135°C; and a hydrogen peroxide detection step of detecting hydrogen peroxide in the heat-treated evaluation solution.