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Mostrando ítems 11-20 de 20
Estudo da viabilidade do uso de métodos de segunda ordem e RMN na elaboração de fingerprint de bauhinia forficata baseado em seu extrato bruto
(Universidade Federal de São Carlos, 2014-10-30)
Given the large number of species of Bauhinia and great morphological similarity between them, it is necessary the development of robust analytical techniques in quality control of plants used as herbal medicines, since ...
Desenvolvimento de métodos analíticos utilizando laser-induced breakdown spectroscopy (LIBS) para determinação de contaminantes, macro e micronutrientes em fertilizantes
(Universidade Federal de São Carlos, 2017-02-22)
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 ...
Determinação de molibdênio em plantas combinando microextração e espectrometria de absorção atômica em chama
(Universidade Federal de São Carlos, 2012-08-16)
In this study, a procedure for the determination of low concentrations of molybdenum in plants by flame atomic absorption spectrometry (FAAS) was developed. The poor sensitivity of FAAS for determination of refractory ...
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 ...
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 ...
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 ...
Avaliação sistemática do efeito de matriz em ensaios bioanalíticos por LC-MS/MS para a análise de rifampicina em fluidos biológicos
(Universidade Federal de São Carlos, 2011-04-29)
Bioanalytical assays by LC-MS/MS were conducted in order to investigate the
matrix effect (ME) in the analysis of rifampicin (RIF) in biological matrices, human
plasma or microsomal fractions, which were submitted to ...
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 / ...
Determinação sequencial rápida de As e Sb, Bi e Pb por espectrometria de absorção atômica com geração de hidretos
(Universidade Federal de São Carlos, 2012-03-22)
In this study it was developed two systems, one for the fast sequencial determination of As and Sb and other for Bi and Pb using flame atomic absorption spectrometry with hydride generation. To optimize the system for the ...
Uso de imagens digitais e ferramentas quimiométricas para identificação e determinação de Cr (VI) em solos contaminados
(Universidade Federal de São Carlos, 2012-03-23)
The determination of toxic metals in soils is an important factor to access their quality or identify possible contamination. The element Cr has double feature: Cr (III) is essential for human beings and Cr (VI) is toxic. ...