METHOD OF DETECTING IRON ION CONCENTRATION IN CONTINUOUSLY FLOWING FLUID

摘要

PROBLEM TO BE SOLVED: To provide a method and device for analyzing a trace amount of iron ion in non-contact manner. SOLUTION: This method for detecting iron ion concentration in a continuous flowing fluid comprises imparting an electromagnetic wave to a continuously flowing liquid that is a subject, measuring the resonance frequency (MHzi) and resonance voltage (Vi) excited by this electromagnetic wave, picking up a resonance voltage (Vii) in the resonance frequency (MHzo) for imparting a maximum resonance voltage of the subject, ad determining the iron ion concentration (Cmin) in the subject corresponding to the resonance voltage (Vii) from the calibration curve between the iron ion concentration (Cm) and resonance voltage (Vm) preliminarily formed from the resonance voltage (Vm) of iron ion concentration in the resonance frequency (MHzo) for giving the maximum resonance voltage of the subject.