Abstract

The aim of this study was to develop a quantitative method to determine phosphorus in fertilizers of different matrix compositions using the laser induced breakdown spectroscopy (LIBS) technique. The LIBS spectra were acquired on 26 samples of organic and inorganic fertilizers by using a low cost, portable, gated CCD system in the atmospheric environment. Inductively coupled plasma optical emission spectroscopy (ICP-OES) was used as the reference technique. A method was developed to remove the outlier spectra and perform the baseline correction and peak normalization. By applying the proposed corrections, the linear correlation between LIBS and ICP increased from R 1/4 0.76 to R 1/4 0.95. An average error of 15% found in cross-validation of LIBS quantification appeared feasible for P quantification in fertilizers. Two reference samples with different matrix compositions were also analyzed, and the absolute error in the quantification was below 5%. Further, no significant fluctuation was found in P quantification when LIBS was performed over 150 days.

Autore Pugliese

• Senesi Giorgio Saverio

Tutti gli autori

• B.S. Marangoni; K.S.G. Silva; G. Nicolodelli; G.S. Senesi; J.S. Cabral; P.R. Villas-Boas; C.S. Silva; P.C. Teixeira; A.R.A. Nogueira; V.M. Benites; D.M.B.P. Milori

Titolo volume/Rivista

Analytical methods

Anno di pubblicazione

2016

ISSN

1759-9679

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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