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Avaliação e correção de interferências na determinação de As e Se por técnicas com plasma acoplado indutivamente
(Universidade Federal de São Carlos, 2012-02-28)
The aim of the thesis was to evaluate different strategies for correcting spectral and non-spectral interferences on As and Se determination by inductively coupled plasma optical emission spectrometry (ICP OES) and mass ...
Desenvolvimento de biossensores utilizando nanotubos de carbono e nanopartículas de ouro
(Universidade Federal de São Carlos, 2012-06-22)
First, a glassy carbon electrode modified with functionalized carbon nanotubes (CNTs) and glucose oxidase was proposed. Cyclic voltammetry of GOx immobilized onto the surface of CNTs showed a pair of well-defined redox ...
Investigação de processos colisionais e reacionais para cromo e vanádio em interface de espectrômetro de massa com plasma indutivamente acoplado
(Universidade Federal de São Carlos, 2013-03-14)
The analytical capability of inductively coupled plasma mass spectrometers (ICPMSs) and their wide use in different fields of science are well known. However some drawbacks, such as the occurrence of isobaric and polyatomic ...
Espectrometria de Emissão Atômica em Filamento de Tungstênio (WCAES) : potencialidades e aplicações
(Universidade Federal de São Carlos, 2012-11-14)
This thesis describes the analytical application of WCAES for the determination of Ca, Al, Cs, Sr and Cr in samples with different compositions. In all studies the observation zone of the detector related to the coil was ...
Desenvolvimento de biossensores à base de filmes poliméricos, nanotubos de carbono e nanopartículas de ouro
(Universidade Federal de São Carlos, 2013-06-07)
In this work was described the development of new architectures for biosensors, using nanomaterials. The enzyme of interest was immobilized on glassy carbon electrode modified with multi-walled carbon nanotubes chemically ...
Desenvolvimento de procedimentos para a determinação de enxofre em diesel, biodiesel e óleo lubrificante usando ICP OES e ICP-MS
(Universidade Federal de São Carlos, 2014-02-19)
Since 1990 concerns about environmental and public health have stimulated the restrictions of maximum sulfur content in fuels allowed by legislation, especially in diesel and biodiesel, by several governmental agencies. ...
Especiação de metais e sua interação com a matéria orgânica dissolvida em um reservatório artificial
(Universidade Federal de São Carlos, 2010-05-28)
Environmental degradation of aquatic ecosystems stimulates investigations about the interactions between dissolved organic matter, trace metals and the biota. This study aimed to investigate the speciation of cadmium, ...
Estratégias quimiométricas para análise de plantas por espectrometria de emissão óptica com plasma induzido por laser
(Universidade Federal de São Carlos, 2010-12-08)
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 ...
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 ...
Construção e aplicação analítica de eletrodos de pasta de carbono modificada com ftalocianina de cobalto para determinação de analítos de interesse.
(Universidade Federal de São Carlos, 2004-04-16)
In this thesis work the development and applications of cobalt
phthalocyanine carbon paste electrode (CoPc/CPE) for voltammetric determination
(cyclic voltammetry and differential pulse voltammetry) of hydrazine in boiler ...