ACIDITY MEASURING APPARATUS AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide an acidity measuring apparatus unnecessary for replacing a conjugate electrolyte at each time when the acidity of a soln. to be measured is measured. SOLUTION: The amt. of a measuring electrolyte is set to sufficiently many mixing ratios with respect to the amt. of a soln. to be measured so as to neglect the influence of the change of a mixing ratio caused by injecting the soln. to be measured in the measuring electrolyte a plurality of times and a plurality of calibration curves for calculating acidity from a reduction pre-wave current value being measuring data are preliminarily used corresponding to the measuring number of times as a correction means of the slight change quantity of the mixing ratio for further highly accurate measurement to perform operational processing to accurately measure the acidity of the soln. to be measured. As a result, the acidity of the soln. to be measured can be measured a plurality of times by using the measuring electrolyte corresponding to one measurement.