Electrochemical sensor for detecting specific peracetic acid in aqueous solutions using procedures amperometric pulse.

A method of measuring peracetic acid in a solution which also contains hydrogen peroxide, the method comprising the provision of: (a) a working electrode of carbon (118) and a reference electrode (120), or (b) an electrode carbon working (118), a reference electrode (120) and a counter electrode (122), in the solution to be analyzed, selectively applying a read voltage to the working electrode, detecting current flowing between the working electrode and the reference electrode or between the working electrode and the counter electrode (122), when present, and converting the flow detected current into an indication of peracetic acid concentration in the solution, the method being characterized by : selectively press the voltage reading on the working electrode; being selected read voltage such that the current flowing is dependent on the concentration of peracetic acid ysustancialmente independent of the concentration of hydrogen peroxide in the solution, the read voltage being in the range of -0, 5--1 , 4 volts, relative to a reference electrode of silver / silver chloride.