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dc.creatorRibeiro, Bruno Teixeira-
dc.creatorCuri, Nilton-
dc.creatorGuilherme, Luiz Roberto Guimarães-
dc.creatorSimões, Bárbara Tenório-
dc.creatorCarvalho, Geila Santos-
dc.creatorSilva, Sérgio Henrique Godinho-
dc.identifier.citationRIBEIRO, B. T. et al. Assessing the SiO2, Al2O3, Fe2O3, P2O5 and TiO2 contents in Brazilian soils via portable X-ray fluorescence equipment. In: WORLD CONGRESS OF SOIL SCIENCE, 21, 2018, Rio de Janeiro. Proceedings... Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2018. v. 2, p. 236.pt_BR
dc.subjectTropical soilspt_BR
dc.subjectSoil chemistrypt_BR
dc.subjectSoil proximal sensorspt_BR
dc.titleAssessing the SiO2, Al2O3, Fe2O3, P2O5 and TiO2 contents in Brazilian soils via portable X-ray fluorescence equipmentpt_BR
dc.typeTrabalho apresentado em eventopt_BR
dc.description.resumoFor Brazilian soils classification, mainly for Latosols (Oxisols), the determination of SiO2, Al2O3 and Fe2O3 is required. Additionally, the P2O5 and TiO2 are also commonly quantified for soil surveys. The conventional analysis is based on determination by colorimetric, gravimetric, and titration based methods or by using atomic absorption spectrometry (AAS) and inductively coupled plasma emission (ICP) after soil digestion using sulfuric acid. This analysis is completely non-environmentally-friendly, time-consuming and generates a great amount of pollutant residues. The portable X-ray fluorescence equipment (pXRF), still incipient in Brazil, can greatly contribute to soil characterization, in-field or in in-lab conditions. This work used pXRF for determination of SiO2, Al2O3, Fe2O3, P2O5 and TiO2 in 156 disturbed air-dried soil samples (< 2 mm). The soil samples were selected from a soil collection of Soil Science Department, Federal University of Lavras, Brazil. In all soil samples the P2O5 concentration was below the detection limit. A poor correlation was observed between SiO2 and Al2O3 obtained by pXRF and the conventional analysis. However, an excellent correlation (R2>0.98) was found for Fe2O3 and TiO2. Others studies indicated that Fe2O3 determination by pXRF is not significantly influenced by soil moisture. This is interesting for determination directly in the field any time.pt_BR
Appears in Collections:DCS - Trabalhos apresentados em eventos

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