Al and Si quantitative analysis in aqueous solutions by LIBS method

In the paper results of Laser-Induced Breakdown Spectroscopy (LIBS) measurements of Al and Si content in aqueous solutions are presented. Calibration curves exhibit good linearity and satisfying R-2 coefficients of determination (over 0.99). The calibration procedures were next used for the determination of Al and Si concentration in biological material transferred into water solutions of unknown Al and Si content. Obtained data were verified by the AAS method (atomic absorption spectrometry). Measurement results showed good conformity. The LIBS spectra were also processed using Factorial Analysis (FA). It was found for Si samples that instead of a classic approach based on the selection of a particular spectral line for the calibration the FA makes possible the use of entire spectra to obtain quantitative information on the investigated material.