Browsing Química - PPGQ by Subject "LIBS"
Now showing items 1-16 of 16
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Desenvolvimento de método de análise direta de folhas de soja e milho empregando a Laser-Induced Breakdown Spectroscopy (LIBS)
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 22/06/2023)This academic master's dissertation was devoted to the development of analytical methods for the determination of macronutrients (P, K, Ca, Mg) and micronutrients (B, Cu, Fe, Mn, S and Zn) in corn, soy (wihout and with ... -
Produção e avaliação de materiais de referência para nutrientes e contaminantes inorgânicos em amostras agronômicas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 29/01/2016)The intensive search for the reliability of results increases the role of reference materials, mainly in analytical chemistry, because they provide metrological references to ensure traceability of measurements and are ... -
Uso de técnicas espectroanalíticas na avaliação de amostras de placas de circuito impresso de lixo eletrônico
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 26/11/2015)The increase in the consumer electronics equipment, especially, the cell has aroused the academia and society in general interest. Such equipment when obsolete became part of the so-called junk mail. Among the components ... -
Determinação de Cd, Co, Cr, Cu, Ni e Pb em cosméticos infantis empregando técnicas espectroanalíticas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, , 18/07/2014)In this study were developed two methods for sample preparation: one for children s eye shadow and another for chidren s lipstick. In the optimizing process, variables such as nitric acid concentration (2 or 7 mol L-1), ... -
Desenvolvimento de métodos analíticos utilizando laser-induced breakdown spectroscopy (LIBS) para determinação de contaminantes, macro e micronutrientes em fertilizantes
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 22/02/2017)In this study analytical procedures were developed using laser-induced breakdown spectroscopy (LIBS) for determination of B, Ca, Cd, Cr, Cu, K, Mg, Mn, Na, Pb, and Zn in solid fertilizers and suspensions. Factorial designs ... -
Precious, strategic and toxic elements in electronic waste: bibliometric evaluation, proposition of reference material and direct analysis by laser-based techniques and fluorescence spectrometry
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 26/03/2021)Waste electrical and electronic equipment (WEEE) is among the fastest growing types of solid waste in the world. In addition, this is a complex waste stream when it comes to recycling, due to the large variety of valuable ... -
Estratégias quimiométricas para análise de plantas por espectrometria de emissão óptica com plasma induzido por laser
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, , 08/12/2010)A simultaneous optimization strategy based on neuro-genetic approach is proposed for selection of operational parameters for the simultaneous determination of macronutrients (Ca, Mg and P), micronutrients (B, Cu, Fe, Mn ... -
Diferentes estratégias espectroanalíticas para a determinação de metais em cosméticos
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 22/10/2015)In this work, it was developed a procedure for the determination of metals in cosmetics, employing the techniques ICP OES, GF AAS, LIBS and LA-ICP OES; in addition, it was explored the potential of chemometric tools. ... -
Avaliação do uso de laser-induced breakdown spectroscopy (LIBS) e wavelength dispersive x- ray fluorescence (WDXRF) na análise direta de couros naturais e sintéticos
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 01/10/2018)The aim of this doctoral thesis was the development of analytical procedures for the qualitative and quantitative analysis of leather samples using LIBS and WDXRF techniques for direct analysis of solid samples. The first ... -
Avaliação de diferentes estratégias de determinação de nutrientes e potenciais contaminantes em alimentos por técnicas baseadas em laser
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 19/10/2018)The present project focuses on the development of strategies for the elemental determination of Ca, Cd, Cr, Cu, Fe, Mg, Pb and Zn in samples of orange juice and dietary supplements by Laser-Induced Breakdown Spectroscopy ... -
Proposição de modelos de classificação e de calibração para polímeros presentes em resíduos eletrônicos empregando laser-induced breakdown spectroscopy (LIBS) e ferramentas quimiométricas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 29/07/2019)This thesis proposes the development of analytical methods for the analysis of polymers from waste electrical electronic equipment (WEEE) by laser-Induced breakdown spectroscopy (LIBS). The results presented in the ... -
Calibration strategies for elemental determination using direct solid analysis by x-ray spectroscopy and laser-induced breakdown spectroscopy
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 30/07/2020)Direct analysis of solid samples using techniques such as wavelength dispersive X-ray fluorescence (WD XRF), X-ray absorption near-edge structure (XANES) spectroscopy and laser-induced breakdown spectroscopy (LIBS); have ... -
Desenvolvimento de procedimentos de preparo de amostras de difícil mineralização para análise direta por laser-induced breakdown spectroscopy (LIBS)
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 27/08/2019)This doctoral thesis proposes sample preparation combined with the use of laser-induced breakdown spectroscopy (LIBS) for analysis of difficult-to-mineralize samples focusing on the analytical development of LIBS as well ... -
Análise foliar de plantas por espectrometria de emissão óptica com plasma induzido por laser (LIBS) e com plasma acoplado indutivamente após ablação com laser (LA-ICP OES)
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, , 20/09/2013)It has been demonstrated that laser induced breakdown spectrometry (LIBS) can be used as an alternative method for the determination of macro (P, K, Ca, Mg) and micronutrients (B, Fe, Cu, Mn, Zn) in pellets of plant ... -
Evaluation of the composition of electronic waste hard disk using spectroanalytical techniques: proposition of fast and simple methods
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 17/12/2020)The electronic waste is a worldwide problem of great magnitude with 53.6 Mt of waste generated in 2019. Unfortunately, the recycling rate is still very low. It is estimated that only 2% of the electronic waste is recycled ... -
Técnicas espectroanalíticas aliadas à química verde visando à determinação de V e Mo com procedimentos de extração e pré-concentração
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Química - PPGQ, Câmpus São Carlos, 14/03/2014)The goal of this PhD thesis was to propose alternatives to improve the analytical performance of F AAS (Flame Atomic Absorption Spectrometry) and LIBS (Laser Induced Breakdown Spectroscopy) aiming V and Mo determination. ...