Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 90, Issue 1-3, Pages 143-150Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-4005(03)00039-X
Keywords
low and high pH values; optical pH sensor; ANN
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The development of an optical pH sensor based on immobilization of mixture of two dyes on a triacetylcellulose membrane is described. The sensor has a useful pH range at low and high pH values, where glass electrodes show acidic and alkaline errors, respectively. Application of a back-propagation artificial neural network (ANN) model extends the measuring range of the proposed optode to the whole pH range. The results show very good agreement between true and predicted pH values. The response of the sensor is reversible and reproducible (R.S.D. less than 2%). (C) 2003 Elsevier Science B.V. All rights reserved.
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