01680naa a2200265 a 450000100080000000500110000800800410001902400500006010000180011024501590012826000090028752007600029665300410105665300300109765300370112765300200116465300340118470000180121870000210123670000200125770000230127770000220130070000240132277300680134621360332021-11-11       2017    bl uuuu     u00u1 u    #d7 ahttp://doi.org/10.1007/s10812-017-0566-42DOI1 aSENESI, G. S.  aLaser-induced breakdown spectroscopy associated with multivariate analysis applied to discriminate fertilizers of different nature.h[electronic resource]  c2017  aA number of phosphate rocks and organomineral P fertilizers was analyzed comparatively by laser-induced breakdown spectroscopy (LIBS) in both single- and double-pulse modes associated with two chemometric methods, i.e., principal components analysis (PCA) and partial least squares regression (PLSR). PCA was demonstrated to be a valuable method for the identification of spectral differences between similar samples with only minor compositional differences. The raw and normalized LIBS spectra were able to provide effective identification and discrimination at a 95% confidence level and in good agreement with the reference concentrations. Results obtained confirm the promising potential of LIBS for the rapid classification of P fertilizers in situ.  aLaser-induced breakdown spectroscopy  aOrganomineral fertilizers  aPartial least squares regression  aPhosphate rocks  aPrincipal components analysis1 aROMANO, R. A.1 aMARANGONI, B. S.1 aNICOLODELLI, G.1 aVILLAS-BOAS, P. R.1 aBENITES, V. de M.1 aMILORI, D. M. B. P.  tJournal of Applied Spectroscopygv. 84, n. 5, p. 923-928, 2017.