Flow injection screening and semiquantitative determination of polycyclic aromatic hydrocarbons in water by laser induced spectrofluorimetry - chemometrics

A continuous method is proposed here for the screening and subsequent semi quantitative determination, if required, of polycyclic aromatic hydrocarbon s (PAHs) in water. The experimental arrangement is based on the use of a fl ow injection (B) manifold that enables preconcentration of the analytes on a C-18 minicolumn before their automatic introduction into a flow-cell for detection. An Nd:YAG laser at 355 nm is used as excitation source and fluor escence emission is detected by a charge coupled device. Multivariate infor mation is analysed by soft independent modelling of class analogy (SIMCA) a nd partial least squares regression type 1 (PLS-1), in order to obtain qual itative and semiquantitative information. (C) 2001 Elsevier Science B.V. Al l rights reserved.