Calibration procedures for a halide Ion-Selective Electrode arrayM. Baret1, P. Fabry2, D.L. Massart3, C. Menardo1 and M. Fraysse1
1 Rhône-Poulenc Industrialisation, CRIT Décines, 24 avenue Jean Jaurès, 69153 Décines Charpieu Cedex, France
2 L.E.P.M.I., École Nationale Supérieure d'Électrochimie et d'Électrométallurgie de Grenoble, France
3 Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090 Brussel, Belgium
Univariate and multivariate Chemometric methods are compared for the determination of ion concentrations measured with a 6 Ion-Selective Electrode array. Principal component analysis is applied as an exploratory method to observe the extent to which interferences occur. Two univariate calibration methods are compared. It is shown that univariate inverse calibration performs at least as well as classical calibration. The use of the former is therefore recommended. The use of partial least squares, principal component regression and multivariate regression is discussed and the possibilities of the method are described.
Key words: Ion-selective electrode / univariate calibration / multivariate calibration / halide.
© EDP Sciences, Wiley-VCH 1998