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Aplicação de imagens digitais e técnicas espectroanalíticas combinadas com quimiometria para detecção e quantificação de adulteração em leite bovino
(Universidade Federal de São Carlos, 2013-02-22)
Milk provides essential nutrients (carbohydrate, fat, protein, minerals and vitamins) of great nutritional relevance for humans, particularly during childhood. Nowadays, the occurrence of milk adulteration is a major issue ...
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 ...
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 ...
Espectroscopia Raman amplificada por superfície associada à cromatografia em camada delgada para análise de amostras alimentícias
(Universidade Federal de São Carlos, 2018-04-13)
Surface enhancement Raman spectroscopy (SERS) presents the advantages of conventional Raman spectroscopy with the possibility to detect compounds in low levels due to the enhancement on Raman intensity, generated by the ...
Estudo da influência do glicerol no processo de deposição de ligas Zn-Mn e nos depósitos de Zn-Mn
(Universidade Federal de São Carlos, 2011-02-18)
The influence of glycerol additive on the electrodeposition process of Zn-Mn on Pt substrate from acid baths by means of cyclic voltammetry and the characteristics of the coatings by Scanning Electron Microscopy (SEM), ...
Diferenciação química de quatro espécies de Bauhinia (pata-de-vaca)
(Universidade Federal de São Carlos, 2018-06-15)
The search for new compounds from natural products with high biological activity is an arduous task that has improved due to the evolution of instrumental analytical techniques. In addition, the use of medicinal herbs for ...
Desenvolvimento de procedimento analítico para determinação fotométrica de mercúrio em sedimentos e águas doces empregando os processos fluxo-batelada e multicomutação em fluxo
(Universidade Federal de São Carlos, 2019-09-19)
DEVELOPMENT OF AN ANALYTICAL PROCEDURE FOR PHOTOMETRIC DETERMINATION OF MERCURY IN SEDIMENT AND DRINKING WATER EMPLOYING THE FLOW-BATCH AND FLOW MULTICOMMUTATION PROCESSES: This work deals with a multicommuted flow-batch ...
Proposição de modelos de regressão para previsão de propriedades de tintas da cadeia produtiva da indústria gráfica
(Universidade Federal de São Carlos, 2019-07-30)
Quality control of inks is very important during and after the manufacturing process and is also meaningful in the consumer industries or paint applicators. For this reason, an opportunity was noticed for the development ...
Desenvolvimento de procedimentos eletroanalíticos para a determinação simultânea de analgésicos em formulações farmacêuticas e fluidos biológicos empregando o eletrodo de diamante dopado com boro
(Universidade Federal de São Carlos, 2015-07-30)
In this master dissertation, electroanalytical procedures for the simultaneous determination of analgesics paracetamol (PAR) and codeine (COD) and, PAR and tramadol (TRA) in pharmaceutical samples and biological fluids ...