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Desenvolvimento de procedimentos eletroanalíticos para a determinação de antioxidantes e corantes em produtos alimentícios empregando um eletrodo de diamante dopado com boro
(Universidade Federal de São Carlos, 2011-04-29)
The following topics were investigated in this thesis: a) the electrochemical response of a boron-doped diamond electrode, after different electrochemical pretreatments, for two antioxidants (butylated hydroxyanisole BHA ...
Teores dos elementos químicos essenciais e tóxicos na rastreabilidade da carne bovina
(Universidade Federal de São Carlos, 2012-02-15)
The objective of this work was to develop methodologies for the determination of inorganic constituents in meat sample and the study of correlations between samples with chemical elements profile, especially Nelore samples ...
Avaliação da espectrometria de emissão óptica com plasma induzido por laser (LIBS) para a determinação de Ba, Cd, Cr e Pb em brinquedos
(Universidade Federal de São Carlos, 2010-11-17)
LIBS is a spectroanalytical technique that employs the microsampling by laser ablation and subsequent exitations for atoms, ions and molecular fragments presents in induced microplasm.This technique was evaluated for ...
Desenvolvimento de eletrodos de carbono vítreo modificados com nanotubos de carbono funcionalizados imobilizados em filmes de hidrocloreto de poli(alilamina) para determinação de fármacos
(Universidade Federal de São Carlos, 2011-02-18)
Research involving carbon nanotubes (CNT) have a great attraction since its synthesis to the technology application. As part of the work was studied the formation and the stability of a functionalized Multiwall Carbon ...
Desenvolvimento de eletrodo modificado com filme de polianilina e estudo da viabilidade da aplicação analítica para catecolaminas
(Universidade Federal de São Carlos, 2010-08-13)
This work describes the development of a polyaniline (PANI) film modified electrode for determination of dopamine (DA) in pharmaceutical formulation. The electropolymerization of PANI film on platinum electrode was performed ...
Avaliação de parâmetros e produção de materiais de referência de suplemento mineral para nutrientes e contaminantes inorgânicos
(Universidade Federal de São Carlos, 2011-09-09)
This paper was prepared a material candidate for reference material for mineral mixture for dairy cattle. Shape certain analytes Ca, K, Na, P, Cu, Fe, Mn, Mg, Zn and contaminants As, Cd and Pb The material was crushed, ...
Transformações na matéria orgânica nos sedimentos e águas eutrofizados da Represa Ibirité (Ibirité-Sarzedo, MG) tratados com nitrato de cálcio em microcosmos
(Universidade Federal de São Carlos, 2010-11-19)
Due to the growing concern with the environment and the welfare of future generations the search for the restoration of degraded areas and the reestablishment of equilibrium between the anthropogenic and natural environments ...
Determinação in situ de analitos de interesse alimentício empregando tratamento de imagens digitais de spot tests
(Universidade Federal de São Carlos, 2013-07-12)
In this work a simple, fast and inexpensive analytical method was developed to carry out in situ determinations of ethanol and sulfite ions in food samples. The method was based on digital images captured by cameras and / ...
Uso de ICP OES para controle de qualidade na produção de fertilizantes
(Universidade Federal de São Carlos, 2011-12-02)
This research work employed an ICP OES with radial configuration for quality control in fertilizer production by the development of analytical procedures for the direct introduction of suspensions based fertilizers of Zn ...
Desenvolvimento de procedimentos para análise inorgânica de biodiesel usando técnicas espectroanalíticas
(Universidade Federal de São Carlos, 2010-08-25)
In this work, analytical procedures are proposed for the determination of major and trace elements in biodiesel samples employing flame atomic absorption spectrometry (F AAS), inductively coupled plasma optical emission ...