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Itens para a visualização no momento 11-19 of 19
Método multirresíduo de agrotóxicos em caqui empregando QuEChERS sem limpeza do extrato e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-03-16)
Pesticides are widely used in food crops and residues of these compounds may be present in these crops. Despite their large-scale use in agriculture, pesticides can be dangerous to human health, animals and the environment. ...
Determinação multirresíduo de agrotóxicos em berinjela empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-09-05)
The intensive use of pesticides in agriculture, especially herbicides, insecticides and
fungicides, aims to control pests and diseases in order to increase production. On the
other hand, consumers of these products can ...
Método multirresíduo rápido para a determinação de agrotóxicos em abobrinha empregando QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-10-14)
In the last decades, the use of pesticides in Brazil and in the world has increased substantially, mainly due to the demand for food. Brazil stands out in the international scenario, mainly in the production and cultivation ...
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 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 ...
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 ...