When it measures analyzes the quantitative analysis manner of the organicity chemical compound in the metal finishing liquid

摘要

PROBLEM TO BE SOLVED: To provide a method for quantitatively analyzing an organic compound in a metal surface treatment liquid and a method for controlling the concentration of the organic compound. SOLUTION: The organic compound is quantitatively analyzed with respect to a supernatant liquid, which is obtained by precipitating paramagnetic metal ions in the metal surface treatment liquid, by hydrogen nucleus nuclear magnetic resonance analysis to calculate the concentration of the organic compound and the organic compound is supplied and added while the concentration of the organic compound is monitored.