Amperometric detection of hydrogen peroxide in bleaching and washing processes

Amperometric detection of hydrogen peroxide in bleaching and washing processes 

In this chapter, the development of an amperometric sensor will be explained and discussed. The principle of the analysis method will be based on the results described in Chapter4 this means that use will be made of the oxidation reaction of hydrogen peroxide in the prewave, and that the concentration will be determined using the rate equation. In addition to measurement of the electrical current response, temperature and pH will therefore also be measured. Accordingly, it is interesting to start with an investigation of the temperature influence. 

All the experimental results and the derived data obtained in the previous sections apply with a temperature of 298.0K. Since the temperature in bleaching processes can vary considerably (working temperature of ca. 288-323 K), it is necessary to verify the way in which the electrode signal depends on the temperature. 

Most factors in parameter G (Chapter 4, Equations 4.55 and 4.56) and the potential of the reference electrode are temperature-dependent this is possibly also the case for factor x. Equation 4.56 also represents the concentration of the hydroxide ion. This means that a potential sensor based on the prewave will also have to contain a pH sensor. The hydroxide ion concentration derived from the output signal of this additional sensor needs to be introduced in the algorithm for the calculation of the hydrogen peroxide concentration. As an additional sensor, a glass electrode is an obvious choice, with a temperature-dependent potential, which is the case also for the potential of the reference electrode associated with the glass electrode and for the pH of the buffers. In this research work, the influence of 

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