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Solid-phase extraction followed by liquid chromatography quadrupole time-of-flight tandem mass spectrometry for the selective determination of fungicides in wine samples
(Elsevier Science, 2011-04)
In this work, a reliable and selective procedure for the determination of thirteen fungicides in red and white wine samples is proposed. Solid-phase extraction (SPE) and liquid chromatography (LC) tandem mass spectrometry ...
Ionic liquid-assisted separation and determination of selenium species in food and beverage samples by liquid chromatography coupled to hydride generation atomic fluorescence spectrometry
(Elsevier Science, 2017-03)
Different ionic liquids (ILs) were assayed as mobile phase modifiers for the separation and determination of selenite [Se(IV)], selenate [Se(VI)], selenomethionine (SeMet) and Se-methylselenocysteine (SeMeSeCys) by ...
Sensitive determination of thallium species in drinking and natural water by ionic liquid-assisted ion-pairing liquid-liquid microextraction and inductively coupled plasma mass spectrometry
(Elsevier, 2012-12-03)
A fast and simple method involving separation and determination of thallium (Tl) species, based on novel ionic liquid-assisted ion pairing dispersive liquid-liquid microextraction (DLLME) method, was developed. Initially, ...
Resíduos de agrotóxicos em ameixa, maçã, pera e pêssego: desenvolvimento de métodos de análise e monitoramento
(Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e Exatas, 2017-02-06)
In recent years, the indiscriminate use of pesticides and a lack of adoption of good
agricultural practices have been evidenced by the results of analyzes of residues of
pesticides in food. Thus, the goal of this work ...
Heurística baseada em PLIM para o sequenciamento de operações de usinagem em máquinas CNC tipo pórtico
(Universidade Federal de Santa MariaBrasilEngenharia de ProduçãoUFSMPrograma de Pós-Graduação em Engenharia de ProduçãoCentro de Tecnologia, 2020-07-20)
This work presents a heuristic procedure based on Mixed-Integer Linear Programming, whose
objective is to solve a problem of sequencing milling operations performed on gantry computer
numerical control machines, to ...
Estudo de metodologia para avaliação de estreptoquinase em produtos biofarmacêuticos
(Universidade Federal de Santa MariaBRFarmacologiaUFSMPrograma de Pós-Graduação em Ciência e Tecnologia Farmacêuticas, 2013-07-26)
Streptokinase is clinically used as a thrombolytic agent for the treatment of patients with
acute myocardial infarction and venous and arterial thrombosis. In the present work, a substrate
chromogenic assay was validated ...
A influência da saturação pós-compactação no comportamento resiliente de dois solos do Rio Grande do Sul empregados em subleito rodoviário
(Universidade Federal de Santa MariaBrasilUFSMCentro de Tecnologia, 2019-12-16)
Aiming to correct one of the predominant defects on brazilian pavements, the fatigue cracking, the National Dimensioning Method was developed, extinguishing the empirical approach applied to highways so far. The new method ...
Preparação e caracterização de scaffolds a base de polímeros naturais para aplicações biomédicas
(Universidade Federal de Santa MariaBrasilEngenharia QuímicaUFSMPrograma de Pós-Graduação em Engenharia QuímicaCentro de Tecnologia, 2018-04-03)
The present study aims at preparing three-dimensional porous structures, chitosan based scaffolds, that allow the regeneration of the bone tissue simultaneously with the degradation of this material. The scaffolds were ...
Fracionamento da fração sólida obtida na pirólise de resíduos plásticos utilizando destilação molecular de filme descendente
(Universidade Federal de Santa MariaBrasilEngenharia QuímicaUFSMPrograma de Pós-Graduação em Engenharia QuímicaCentro de Tecnologia, 2017-08-29)
The large generation of plastic waste entails the need for recycling methods for the reduction and recovery of these materials. Molecular distillation technology is a viable process to separation high value-added products. ...
Multivariate optimisation of the experimental conditions for determination of three methylxanthines by reversed-phase high-performance liquid chromatography
(2005)
Caffeine (1,3,7-trimethylxanthine), theobromine (3,7-dimethylxanthine) and theophylline (1,3-dimethylxanthine) are the most important naturally occurring methylxanthines. Caffeine is a constituent of coffee and other ...