The above results show that the application of a mixture of
DPA and VB immobilized on a triacetylcellulose membrane
can offer a suitable pH sensor for wide range pH measurements.
The membrane produced by this method possesses
high stability, short response time and excellent spectral
characteristics. One of the best features of such an optode is
its ability to measure pH at high and low pH ranges, where
glass electrodes encounter alkaline and acid errors, respectively.
The ultimate effect of implementing ANN on the
optical pH sensor was the extension of the useful working
range of the sensor. This sensor exhibits advantages over
many existing optical pH sensors including wider dynamic
pH range, ease of fabrication, good reversibility and stability.