Calibration procedures for a halide Ion-Selective Electrode array

Univariate and multivariate Chemometric methods are compared for the determ ination of ion concentrations measured with a 6 Ion-Selective Electrode arr ay. Principal component analysis is applied as an exploratory method to obs erve the extent to which interferences occur. Two univariate calibration me thods are compared. It is shown that univariate inverse calibration perform s at least as well as classical calibration. The use of the former is there fore recommended. The use of partial least squares, principal component reg ression and multivariate regression is discussed and the possibilities of t he method are described.