Now showing items 1-10 of 2633
Multirresíduo empregando UPLC-MS/MS e GC-MS/MS para determinação de agrotóxicos em cebola.
(In: SIMPÓSIO BRASILEIRO DE CROMATOGRAFIA E TÉCNICAS AFINS, 2014, Campos do Jordão. Livro de Resumos... Campos do Jordão: 2014. Ref. H12., 2014)
Analysis of Steroids using Solid Phase Microextraction-Gas Chromatography-Mass Spectrometry-Mass Spectrometry (SPME-GC-MS-MS)
Direct immersion SPME-GC-MS-MS was used for the analysis of steroids in water at part-per-trillion(ppt) and lower concentrations. The method was validated and extended to real sample analysis. The method were linear from ...
Analyses by GC-MS and GC-MS-MS of the hantzsch synthesis products using hydroxy- and methoxy-aromatic aldehydes
(PERGAMON-ELSEVIER SCIENCE, 2007-05-09)
El mass spectra of products of the dihydropyridine Hantzsch synthesis using hydroxy and methoxy aldehydes as starting materials are reported. The reaction products (C-4 hydroxy- and methoxyphenyl-1,4-dihydropyridines and ...
Avaliação da técnica de extração de SPE E GC-(EI)-MS/MS na análise de agrotóxicos em água de lavoura de arroz irrigado
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2012-02-14)
It is known that heavy use of pesticides, especially herbicides and insecticides, associated with the improper management of irrigation water can result in pesticide runoff out the crops to the waters streams, rivers ...
Resíduos de agrotóxicos em água potável usando SPE e determinação rápida por LC-MS/MS e GC-MS/MS
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2012-08-31)
The use of pesticides always has been associated with the effective control of pests or invasive weeds to ensure an increase in the food production. However, the indiscriminate use of these substances has caused the ...
Validação de metodologia para determinação de hidrametilnona por cromatografia gasosa com detector de massas (GC-MS)
(Universidade Estadual Paulista (UNESP), 2015-09-16)
This method was developed and validated according to standards of ANVISA for qualitative and quantitative determination of Hydramethylnone content in technical product and formulated from this.
Determinação multirresíduo de agrotóxicos em água empregando microextração líquido-líquido dispersiva (DLLME) E GC-MS/MS
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2015-06-19)
The use of pesticides is related to effectiveness in pest control, as well as productivity in food production in agriculture. However, the use of these substances in high amounts is directly affecting water resources, ...
ESI(+)-MS and GC-MS Study of the Hydrolysis of N-Azobenzyl Derivatives of Chitosan
(Mdpi Ag, 2014-11-01)
New N-p-chloro-, N-p-bromo-, and N-p-nitrophenylazobenzylchitosan derivatives, as well as the corresponding azophenyl and azophenyl-p-sulfonic acids, were synthesized by coupling N-benzylvchitosan with aryl diazonium salts. ...