Laser-induced breakdown spectroscopy applied to the quantification of K, Ca, Mg and Mn nutrients in organo-mineral, mineral P fertilizers and rock fertilizers.

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dc.contributorCESAR CERVANTES, UNIVERSIDADE DE SÃO PAULO; BRUNO S. MARANGONI, UNIVERSIDADE FEDERAL DE MATO GROSSO DE SUL; GUSTAVO NICOLODELLI, UNIVERSIDADE FEDERAL DE SANTA CATARINA; GIORGIO S. SENESI, CONSIGLIO NAZIONALE DELLE RICERCHE; PAULINO RIBEIRO VILLAS BOAS, CNPDIA; CAROLINE S. SILVA, UNIVERSIDADE FEDERAL DE SÃO CARLOS; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; VINICIUS M. BENITES, EMBRAPA SOLOS, RUA JARDIM BOTÂNICO 1024, RIO DE JANEIRO 22460-000, RJ, BRAZIL; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA.
dc.creatorCERVANTES, C.
dc.creatorMARANGONI, B. S.
dc.creatorNICOLODELLI, G.
dc.creatorSENESI, G. S.
dc.creatorVILLAS-BOAS, P. R.
dc.creatorSILVA, C. S.
dc.creatorNOGUEIRA, A. R. de A.
dc.creatorBENITES, V. M.
dc.creatorMILORI, D. M. B. P.
dc.date2024-11-25T19:46:58Z
dc.date2024-11-25T19:46:58Z
dc.date2024-11-25
dc.date2024
dc.date.accessioned2026-07-07T04:29:34Z
dc.descriptionA low-cost laser-induced breakdown spectroscopy (LIBS) instrument equipped with a charge-coupled device (CCD) was tested in the atmospheric environment for the quantification of K, Ca, Mg, and Mn in some organo–mineral fertilizers, mineral P fertilizers, and rock fertilizers of various compositions and origins, using flame atomic absorption spectrometry (FAAS) as the reference technique. The correlation analysis performed between each CCD pixel and the corresponding element concentration measured by FAAS allowed to choose the most appropriate K, Ca, Mg and Mn emission lines for LIBS analysis. The normalization process applied to LIBS spectra to correct physical matrix effects and small fluctuations was able to increase the linear correlation of the calibration curves between LIBS data and FAAS data by an average of 0.15 points of the R-value for all elements of interest. The R values of calibration curves were 0.97, 0.96, 0.86 and 0.84, for K, Ca, Mg and Mn, respectively. The limits of detection (LOD) were 66 mg/kg (K), 35 mg/kg (Ca), 5.4 mg/kg (Mg) and 0.8 mg/kg (Mn) when using LIBS in the quantification model. The cross-validation (leave-one-out) analysis yielded an absolute average error of 12% (K), 21% (Ca), 8% (Mg) and 13% (Mn) when LIBS data were correlated to FAAS ones. These results showed that the calibration models used were close to the optimization limit and satisfactory for K, Ca, Mg, and Mn quantification in the fertilizers and rocks examined.
dc.identifierMinerals, v. 14, n. 11, 1109, 2024.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1169485
dc.identifierhttps://doi.org/10.3390/min14111109
dc.identifier.urihttp://hdl.handle.net/123456789/463085
dc.languageeng
dc.rightsopenAccess
dc.subjectLIBS
dc.subjectOrganic-phosphate fertilizers
dc.subjectPhosphate fertilizers
dc.subjectFAAS
dc.subjectFertilizante Fosfatado
dc.titleLaser-induced breakdown spectroscopy applied to the quantification of K, Ca, Mg and Mn nutrients in organo-mineral, mineral P fertilizers and rock fertilizers.
dc.typeArtigo de periódico

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