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Estudo da estabilidade a campo dos pesticidas carbofurano e quincloraque em água de lavoura de arroz irrigado empregando SPE e HPLC-DAD
(Universidade Federal de Santa Maria, 2007-07-24)
The use of pesticides to control pests, diseases and weeds in crops of agricultural interest aims at the increase of production. The degradation of applied compounds or their conversion into other products, does not ...
Desenvolvimento e validação de método utilizando SPE E GC-MS para a determinação multirresíduo de pesticidas em água potável
(Universidade Federal de Santa Maria, 2007-09-05)
The water resources contamination has caused great environmental impact worldwide. In Brazil, the Ministry of Health through the Law 518 defines potability
parameters, between them, the maximum limits for a list of ...
Determinação de cloreto por cromatografia de íons em petróleo extrapesado, coque e resíduo de vácuo após decomposição em sistema fechado por combustão iniciada por microondas
(Universidade Federal de Santa Maria, 2007-07-27)
A method for chloride determination in heavy crude oil, petroleum coke and vacuum residue after microwave-induced combustion (MIC) in closed vessels is described. Samples (with exception of petroleum coke) were wrapped ...
Determinação do número de acidez total em resíduo de destilação atmosférica e de vácuo do petróleo empregando a espectroscopia no infravermelho (ATR-FTIR) e calibração multivariada
(Universidade Federal de Santa Maria, 2007-12-14)
The crude oil might contain a series of contaminants that can to produce undesired properties. Naphthenic acids (NA), for example, perhaps promotes corrosion in refineries. The determination of total acid number (TAN) in ...
Determinação de enxofre em petróleo pesado resíduo de vácuo e coque por ICP OES após combustão iniciada por microondas em sistema fechado
(Universidade Federal de Santa Maria, 2007-07-31)
In this work was proposed a microwave induced combustion procedure in closed vessels for decomposition of heavy crude oil, vacuum residue and coke for further sulfur determination by inductively coupled plasma optical ...
Desenvolvimento e validação de método multirresíduo para determinação de pesticidas em arroz polido utilizando método QuEChERS modificado, clean-up dispersivo e GC-MS (NCI-SIM)
(Universidade Federal de Santa Maria, 2007-03-01)
The rice is the main component of the basic diet of the world-wide population, is therefore, of extreme importance for the food security. In function of this, related aspects its production and comsumption must continuously ...
Investigação de propriedades no estado sólido de triazenos simétricos 1,3-diarilsubstituídos e complexos com Co(III) e Cu(II) com o ligante 1,3-bis(4-metoxicarbonilfenil)triazenido
(Universidade Federal de Santa Maria, 2007-08-13)
In this work it was synthesized and determinate the crystalline/molecular structure of two pré ligands triazene simetric: 1,3−bis−(4−acethylamidephenyl)triazene
[H3CC(O)NHC6H4NNNC6H4NH(O)CCH3] (1) e o 1,3−bis−(4−ethoxic ...
Sulfoximidovinil trifluormetil cetonas. Obtenção e aplicação na síntese de azóis e azinas derivadas
(Universidade Federal de Santa Maria, 2007-07-02)
This work describes the synthesis of a new series of 4-alkyl(aryl)-4-tetramethylenesulfoximide-1,1,1-trifluorobut-3-en-2-ones (5a-k) by the O,N-exchange reactions of ketones (1a-k) [CF3C(O)CH=CR1R, where R = OMe, OEt; R1 ...
Determinação de metais como contaminantes em formulações de eritropoetina empregando métodos voltamétricos
(Universidade Federal de Santa Maria, 2007-07-20)
The contamination of renal failure patients by metals can be associated to the presence of these metals in the medication, since they can be absorbed by the organism. The level of contamination caused by medication, in ...
Especiação de compostos de arsênio em águas e fluidos biológicos empregando pré-tratamento fotoquímico e métodos voltamétricos
(Universidade Federal de Santa Maria, 2007-12-21)
The presence of arsenic as a contaminant in water and biological fluids has been studied in recent years due to the high toxicity of this element. In this work a method for the selective determination of arsenic species ...