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Mostrando ítems 231-240 de 249
Preparação, caracterização e estudos termoanalíticos de bases de Schiff biopoliméricas e seus complexos de cobre
(Universidade Federal de São Carlos, 2004-12-13)
The present work is divided in three parts. The first part deals with the purification and characterization of commercial chitosan from different suppliers. The second part describes the synthesis and characterization of ...
Avaliação da viabilidade da determinação de cobalto e cromo em alimentos por espectrometria de absorção atômica com forno tubular na chama e aerossol térmico (TS-FF-AAS).
(Universidade Federal de São Carlos, 2006-02-23)
In this work, a nickel tube used as atomization cell and a ceramic capillary for thermospray generation (TS-FF-AAS) were employed to increase the analytical performance of the flame atomic absorption spectrometry (FAAS). ...
Determinação e fracionamento de bário em castanha-do- Pará
(Universidade Federal de São Carlos, 2007-08-30)
In this work it was studied the determination and fractionation of barium in Brazil nuts employing several strategies for sample preparation and spectroanalytical techniques, i.e. graphite furnace atomic absorption ...
Análise química de materiais argilosos e refratários modificados durante moagem por espectrometria de emissão óptica com plasma acoplado indutivamente.
(Universidade Federal de São Carlos, 2006-03-03)
The main goal of this thesis was the investigation of alternative procedures for chemical analysis of refractory materials and clays using an inductively coupled plasma optical emission spectrometry (ICP OES) with axial ...
Análise química de materiais cerâmicos : digestão por fusão e medidas por ICP OES com configuração axial
(Universidade Federal de São Carlos, 2007-10-26)
Ceramic samples are efficiently digested using fusion procedures. However the elevated amounts of dissolved solids in the resulting solutions may cause spectral and transport
interferences, affect the analytical blanks ...
Desenvolvimento e aplicação de eletrodos compósitos à base de borracha de silicone e grafite.
(Universidade Federal de São Carlos, 2004-10-21)
Composite electrodes were prepared using graphite powder and silicone rubber in different compositions. The use of such hydrophobic materials interned to diminish the swallowing observed in other cases when the electrodes ...
Simulação do crescimento de filmes sobre metais. O caso voltamétrico
(Universidade Federal de São Carlos, 2008-07-02)
In this work the anodic film growth on metals has been studied, under voltammetric conditions by simulation. It was supposed that: a) the films are ultrathin, i.e., the concentration gradient contributions for the ionic ...
Estratégias para a determinação de minoxidil
(Universidade Federal de São Carlos, 2005-07-25)
Methods for the determination of minoxidil in commercial samples are presented. The minoxidil is a pharmaceutical whose dilation blood vessel property is used in the treatment of the Arterial Hypertension and in the treatment ...
Avaliação das condições operacionais de espectrômetro de emissão óptica com plasma acoplado indutivamente com configuração axial
(Universidade Federal de São Carlos, 2007-02-23)
The goal of this thesis was the critical
evaluation of the analytical capability of an inductively coupled plasma spectrometer
(ICP OES) with axially viewed configuration. The general view that axially systems are mainly ...
Desenvolvimento de um método para quantificação simultânea de sulfametoxazol e trimetoprima em ovos de galinha utilizando a cromatografia liquida de alta eficiência bidimensional
(Universidade Federal de São Carlos, 2007-04-13)
This work reports the investigation of a series of bovine serum albumin (BSA) restricted access media columns (RAM) for on-line egg samples deproteinization. High exclusion percentage of egg s proteins were obtained with ...