FIGURES OF MERIT IN MULTIVARIATE CALIBRATION - DETERMINATION OF 4 PESTICIDES IN WATER BY FLOW-INJECTION ANALYSIS AND SPECTROPHOTOMETRIC DETECTION

The accuracy, trueness and determination limit of a flow injection ana lysis (FIA) method are evaluated in the simultaneous determination of the pesticides Carbaryl (RYL), Carbofurane (CBF), Propoxur (PPX) and I soprocarb (IPC) in water by multicomponent analysis. Calibration is ba sed both on the spectra of artificially made samples according to the experimental design theory and the spectra of pure pesticides. Predict ion errors in the range 0.1-1.4 evaluated as RMSEP are obtained. The a bsence of bias is evaluated from the joint confidence interval test fo r the regression line obtained from measured and predicted concentrati ons taking into account errors in both axes, Multivariate determinatio n limits were found to be between 0.03 and 1.0 ppm.