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LIBS technique evaluation for Ca, K, P and N determination in new smart sustainable fertilizers

Grant number: 15/24757-9
Support type:Regular Research Grants
Duration: May 01, 2016 - April 30, 2018
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Edilene Cristina Ferreira
Grantee:Edilene Cristina Ferreira
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Assoc. researchers:Clovis Augusto Ribeiro ; José Anchieta Gomes Neto ; Marisa Spirandeli Crespi


Fertilizers are important for increasing agricultural productivity, though many losses of fertilizers applied are observed. Such losses increase the cost of productivity and contribute to the accumulation of nutrients in terrestrial and aquatic ecosystems, causing environmental problems. In order to take full advantage of fertilizers, some investigations have been conducted towards the achievement of gradual nutrients release fertilizers. Ongoing research in the Thermal Analysis Laboratory of the Chemistry Institute of Araraquara - UNESP, have indicated the possibility of getting a new fertilizer for nutrient gradual release, which should be produced with biochar, a sustainable material. In the fertilizer evaluation context, it is essential for characterization, the quantitative determination of nutrient elements effectively incorporated into the material during the production process, as well as evaluating the nutrients release. Accordingly, analytical methods that provide a rapid and direct sample analysis may contribute more efficiently with the material characterization and consequently with its development. The Laser-Induced Breakdown Spectroscopy (LIBS) is an analytical technique that allows to evaluate the elemental composition of a sample, in few seconds, from material direct analysis. However, the development of quantitative methods using LIBS require the evaluation of several parameters, particularly the intrinsic barriers related to the calibration. Thus, this proposal aims to evaluate the LIBS technique for the development of quantitative analytical methods in order to determine N, P, K and Ca in new biochar-based fertilizers. (AU)

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE MORAIS, CARLA PEREIRA; BARROS, ARIANE ISIS; BECHLIN, MARCOS ANDRE; SILVA, TIAGO VARAO; SANTOS JUNIOR, DARIO; SENESI, GIORGIO SAVERIO; CRESPI, MARISA SPIRANDELI; RIBEIRO, CLOVIS AUGUSTO; GOMES NETO, JOSE ANCHIETA; FERREIRA, EDILENE CRISTINA. Laser-induced breakdown spectroscopy determination of K in biochar-based fertilizers in the presence of easily ionizable element. Talanta, v. 188, p. 199-202, OCT 1 2018. Web of Science Citations: 3.
VIEIRA, ALAN LIMA; SILVA, TIAGO VARAO; INOCENCIO DE SOUSA, FELIPE SCHIAVON; SENESI, GIORGIO SAVERIO; SANTOS JUNIOR, DARIO; FERREIRA, EDILENE CRISTINA; GOMES NETO, JOSE ANCHIETA. Determinations of phosphorus in fertilizers by spark discharge-assisted laser-induced breakdown spectroscopy. Microchemical Journal, v. 139, p. 322-326, JUN 2018. Web of Science Citations: 7.
DE MORAIS, CARLA PEREIRA; BARROS, ARIANE ISIS; SANTOS JUNIOR, DARIO; RIBEIRO, CLOVIS AUGUSTO; CRESPI, MARISA SPIRANDELI; SENESI, GIORGIO SAVERIO; GOMES NETO, JOSE ANCHIETA; FERREIRA, EDILENE CRISTINA. Calcium determination in biochar-based fertilizers by laser-induced breakdown spectroscopy using sodium as internal standard. Microchemical Journal, v. 134, p. 370-373, SEP 2017. Web of Science Citations: 15.

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