Halide ion-selective electrode array calibration

The calibration of several ions (Cl-, Br-, F- and OH-) measured with an ion selective electrodes (ISE) array has been carried out in the presence of i nterferents using an experimental design and multivariate calibration metho ds. Partial least squares regression and principal component regression do not seem to improve the test set prediction compared to multivariate linear regression. In the case of very slight or no interference on the ISE, each ion can be determined using the corresponding ISE and univariate calibrati on methods, but the use of multivariate methods does not lead to worse resu lts. (C) 1999 Published by Elsevier Science B.V. All rights reserved.