Chemistry Reference
In-Depth Information
1.1
0.7
1.0
0.9
0.4
0
100
200
300
400
500
Time (min)
0.8
0.7
0.6
0.5
0.4
0
10
000
20
000
30
000
40
000
50
000
60
000
70
000
80
000
Time (min)
5.15
Measurement of the hydrogen peroxide concentration during
bleaching processes determined by means of the sensor system
(—) and titration (
¥
). The smaller figure represents the measured
data during the first 500 min.
The results of the test are given in Fig. 5.15, confirming the conclusions from
the tests described above.
5.5
Expanding the sensor system for processes
occurring at pH
<
10.5
5.5.1
Introduction
As indicated in Chapter 4 (section 4.1), the applications of hydrogen per-
oxide are not limited to the bleaching of cotton. Other application areas,
such as the use of hydrogen peroxide in the paper industry, in processes
involving the synthesis of inorganic and organic products, and as a disin-
fectant in swimming pools and in waste-water purification, are situated
outside the pH area in which the sensor can be used directly. In these appli-
cations as well, the continuous measuring and adjusting of the hydrogen
peroxide concentration by means of a sensor system is regarded as useful.
Considering the environmentally friendly character of hydrogen peroxide,
its use has increased strongly; in the future no doubt, further application
areas will arise in which the use of a sensor system will be crucial.
