Stand-off LIBS; Laser-induced breakdown spectroscopy; Classification; PCA; LDA; Cultural heritage;

Focusing on historical aspect, during archeological excavation or restoration works of buildings or different structures built from Brick it is important to determine, preferably in-situ and in real-time, the locality of Brick origin. Fast classification of Brick on the base of Laser-Induced Breakdown Spectroscopy (LIBS) spectra is possible using multivariate statistical methods. Combination of principal component analysis (PCA) and linear discriminant analysis (LDA) was applied in this case. LIBS was used to classify altogether the 29 brick samples from 7 different localities. Realizing comparative study using two different LIBS setups — stand-off and table-top it is shown that stand-off LIBS has a big potential for archeological in-field measurements.