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Itens para a visualização no momento 11-20 of 20
Método multirresíduo para determinação de agrotóxicos em mamão empregando QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-10-21)
Papaya is the fourth most consumed fruit in Brazil and the third most exported fruit by
the country. In search of better results in production and greater resistance to diseases
and pests, pesticides have their widespread ...
Determinação de resíduos de agrotóxicos em canola empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-09-09)
Rapeseed has been used as green fodder for animal feed, fertilizer for soil
conditioning, and as a raw material for oil extraction. It has been used as human food,
for industrial use, and more recently for the production ...
Extração líquido-líquido miniaturizada para determinação de Li, Na, K, Ba, Ca, Mg e Sr em petróleo por ICP-OES
(Universidade Federal de Santa Maria, 2022-10-27)
In this study, a miniaturized ultrasound combined liquid-liquid extraction (US-LLE) method was
developed for the extraction and subsequent Li, Na, K, Ba, Ca, Ca, Mg and Sr determination by
ICP-OES in crude oils. For the ...
Determinação multirresíduo de agrotóxicos em abelha (Apis mellifera) empregando mini-QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-10-28)
Brazil has a favorable climate for extensive agricultural production, which is generally associated with the intensive use of pesticides. The harmful effect of pesticides on bee health is a topic of global concern. In the ...
Desenvolvimento de metodologia para análise de especiação de cromo em fertilizantes orgânicos
(Universidade Federal de Santa Maria, 2022-10-28)
In this work, a methodology was developed for the analysis of chromium speciation in organic fertilizer by liquid chromatography coupled to inductively coupled plasma mass spectrometry (LC-ICP-MS). For the evaluation of ...
Determinação de flúor em sementes de plantas leguminosas e oleaginosas após combustão iniciada por micro-ondas em frascos descartáveis
(Universidade Federal de Santa Maria, 2023-03-10)
In this work, the use of microwave-induced combustion in disposable vessels (MIC-DV) for fluoride determination in leguminous seeds and oilseeds (almond, peanut, hazelnut, Brazil nut, pecan nut, pea, pinto bean, chickpea, ...
Método de preparo de amostras em câmara única de reação assistida por radiação micro-ondas e determinação de elementos terras raras em azeite de oliva extra virgem por USN-ICP-MS
(Universidade Federal de Santa Maria, 2022-12-16)
The rare earth elements (REE) present in extra virgin olive oil (EVOO) have been
considered as studied markers for traceability of the production origin. However, REE
are present in low concentrations (ng g-1
range) in ...
Determinação de cafeína, teobromina e ácido clorogênico em erva-mate por HPLC-DAD e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2023-06-14)
Yerba mate (Ilex paraguariensis) is a very consumed product in the south of South America,
mainly in the south of Brazil, which is one of the largest producers of it. It can be consumed in
several ways, but the main one ...
Determinação multiclasse de contaminantes em suplemento alimentar à base de óleo de peixe por GC-MS/MS
(Universidade Federal de Santa Maria, 2022-10-26)
In recent years, the demand for fish oil-based supplements has increased significantly, which
can be mainly attributed to the high concentrations of polyunsaturated fatty acids present in
fish, which are associated with ...
Emprego da microextração líquido-líquido dispersiva para extração de ferro em cerveja e determinação por espectrometria de absorção atômica com chama
(Universidade Federal de Santa Maria, 2023-03-09)
In this work, a sample preparation method based on dispersive liquid-liquid microextraction (DLLME) for the extraction and preconcentration of Fe in beer and subsequent determination by flame atomic absorption spectrometry ...