Method for detecting oxidative metal ion in water

The invention discloses a method for measuring the oxidizing metallic ions in water, pertaining to the technical field of environmental monitoring. The method is as follows: a organic solvent containing iodine after extraction is poured into a glass micropipe; then, a platinum wire is inserted into the glass micropipe of which the front end is sealed to form a platinum electrode, namely, a working electrode which is just positioned on the interface of electrolyte solution without iodine ions so as to from a liquid/ liquid interface; and after a reference electrode, an auxiliary electrode and the working electrode are all well fixed, the three electrodes are connected with an electrochemical analyzer, then electrochemical analysis is carried out by square wave voltammetry or cyclic voltammetry so as to measure the metallic ions with strong oxidizing property. As an organic solvent MIBK has low toxicity and does not dissolve in water, the characteristics of environmental harm and the like of the traditional dro