Salinity measurements with polyaniline matrix coated wire electrodes

Potentiometric measurements were carried out: with a wire electrode coated with a mixture of polyaniline and polystyrene. The salinity in water is obt ained by measuring the potential difference between the coated wire electro de and an Ag\AgCl, saturated KCl reference electrode. The salinity of a sam ple is obtained by the interpolation of its potential in the calibration cu rve obtained with KCl solutions of known concentrations. The results indica ted that it is possible to measure the salinity in sea water, brackish wate r and drinking water in the range of 0.010 to 75 parts per thousand. (C) 19 99 Elsevier Science S.A. All rights reserved.