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Desenvolvimento e aplicação de um sistema com arco elétrico para SS-FF AAS para a determinação de impurezas elementares
(Universidade Federal de Santa Maria, 2020-01-25)
An alternative system for solid sampling and element determination by heated tube coupled to flame atomic absorption spectrometry was developed for the determination of Cd, Co, Mo, Ni and Pb in high purity graphite and ...
Desenvolvimento de método utilizando a microextração líquido-líquido dispersiva em fase reversa para determinação de As, Cd, Hg, Pb, Co, Ni e V em excipientes farmacêuticos oleosos
(Universidade Federal de Santa Maria, 2021-03-05)
In this study, an extraction method using oily pharmaceutical excipients was developed for further determination of elemental impurity from classes 1(As, Cd, Hg, and Pb) and 2A (Co, Ni, and V) according to ICH Q3D. The ...
Síntese, caracterização e estudo fotofísico de novas calcogenoporfirinas derivadas da 5,10,15,20–tetrakis (4-bromometilfenil)porfirina
(Universidade Federal de Santa Maria, 2020-09-30)
In this work, two classes of porphyrins were prepared, the first involving the synthesis of new calcogenoporphyrins derived from 5,10,15,20 - tetrakis (4-bromomethylphenyl) porphyrin, characterization and study of photophysical ...
Síntese de compostos α-organiltio carbonílicos utilizando sais de bunte como fonte de enxofre
(Universidade Federal de Santa Maria, 2020-02-21)
In this work, a series of α-organylthio carbonyl compounds were synthesizes from β-ketoesteres and Bunte salts, using NaOH as a reaction promoter in toluene at 100 ºC. The selectivity for the formation of two products, ...
Compostos de coordenação de níquel(II) contendo ligante dioxo-halogenosselenito e de cobre(II) contendo ligante hidrogenosselenito: síntese, caracterização e aplicações
(Universidade Federal de Santa Maria, 2021-03-05)
This work describes the synthesis and structural characterization of five new coordination compounds containing inorganic ligands the dioxo-halogenselenate and hydrogenselenite anions. The compounds [NiCl(SeO2Cl)(bipy)2] ...
Estudo de adsorção gás-sólido de hidrocarbonetos policíclicos aromáticos em diferentes adsorventes
(Universidade Federal de Santa Maria, 2020-09-25)
The extraction and the gas-solid adsorption behavior of different polycyclic aromatic hydrocarbons (PAHs) were studied in aqueous solution and in four different asphalt petroleum cement (APC) samples, using high-performance ...
Síntese de 3-organocalcogenil-2-organo-cromenonas via reações de ciclização intramolecular mediada por selectfluor®
(Universidade Federal de Santa Maria, 2021-09-30)
This paper reports the development of an effective synthetic protocol between 1,3-
organo-propynones 1 and different diorganoyl dicalcogenides 2 mediated by Selectfluor® and
employing acetonitrile as a solvent, at room ...
Síntese de 1H-isocalcogênocromenos via NA2SE a partir de derivados de eninos
(Universidade Federal de Santa Maria, 2020-02-21)
In the present work, we developed the synthesis of 1H-isocalcogenochromene via a nucleophilic
addition of Na2Se to enynes. The reaction parameters were studied and the results
indicated that the reaction of enynes (0.25 ...
Determinação elementar e avaliação da geração química de vapor para determinação simultânea de As e Hg em suplementos alimentares por MIP OES
(Universidade Federal de Santa Maria, 2021-09-09)
In this work the suitability of microwave induced plasma optical emission spectrometry (MIP OES) for the determination of essential and non-essential elements in dietary supplements was evaluated. In this purpose, thirteen ...
Síntese e propriedades fotofísicas de bases de schiff e 1,3-benzoxazinas derivadas de 6-amino-4-(trifluormetil)quinolinas
(Universidade Federal de Santa Maria, 2020-09-24)
The present work describes the synthesis, structural study and evaluation of the photophysical properties of new Schiff bases, (E)-2-(((2-(alkyl/aryl/heteroaryl)-4-trifluormethyl)quinolin-6-il)imino)methyl)phenols, as well ...