Gas Flow Detector
Mostrando 1-12 de 15 artigos, teses e dissertações.
-
1. Response Factor in GC-FID Methyl Ester Analysis in Several Biodiesels: A Comparative Study of the EN 14103:2011 and ABNT 15764:2015 Methods versus a Proposed GC-FID Procedure for Individual Ester Determination
A gas chromatography method with a flame ionization detector enabled by relative response factor was developed to determine the individual and the total content of esters in biodiesel. This method accounts for different response factors of the detector for a homologous series of esters that may be present in biodiesel. In this way, the determination of the t
Journal of the Brazilian Chemical Society. Publicado em: 2022
-
2. Optimization of New Sample Preparation Technique for the Determination of Methadone and Codeine in Plasma Sample by GC-FID
A continuous sample drop flow microextraction (CSDF-ME) technique was modified for the pretreatment of plasma samples in the determination of methadone and codeine. The limit of detection and linear range for methadone were 15.0 µg L-1 and 0.1-10.0 mg L-1, respectively. The detection limit and linear range for codeine were 25.0 µg L-1 and 0.2-15.0 mg L-1,
J. Braz. Chem. Soc.. Publicado em: 2020-03
-
3. Development and evaluation of an inhalation chamber for in vivo tests
ABSTRACT The bioavailability, toxicity, and therapeutic efficacy of a drug is directly related to its administration route. The pulmonary route can be accessed by inhalation after fumigation, vaporization or nebulization. Thus, pharmacological and toxicological evaluation accessed by an apparatus specifically designed and validated for this type of administr
An. Acad. Bras. Ciênc.. Publicado em: 17/08/2017
-
4. Caracterizacao qualitativa e quantitativa de elementos, pela tecnica de fluorescencia de raios X, em suplementos minerais para animais. I. Dispersao de comprimento de onda.
Pela tecnica analitica instrumental de fluorescencia de raios X por dispersao de comprimento de onda (WD-XRF), com a utilizacao de um tubo de raios X com alvo de Rh (40Kv, 30mA) e detectores e fluxo gasoso e cintilador solido de Nal(TI), foi adaptado um metodo para a determinacao da concentracao dos microelementos Mn, Fe, Co, Cu e Zn em suplementos minerais
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
-
5. Avaliação dos tipos de processamento na descontaminação e na degradação do polipropileno reciclado / Evaluation of types of processing in the decontamination and degradation of recycled polypropylene
Polypropylene is one of the most used polymers worldwide, especially by the disposable packaging industry, causing serious environmental problems. Despite the fact that recycling this polymer has become common in Brazil due to its growing market, there are still some restrictions regarding its use in direct-contact food packaging. Therefore, in order to eval
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2010
-
6. Folatos, capacidade antioxidante e trans-2-nonenal em cerveja brasileira / Folate, antioxidant capacity and E-2-nonenal in Brazilian beer
In the present study methods were adapted and applied to quantify levels of folate, antioxidant capacity assessment and E-2-nonenal quantification in Brazilian beers. 5 brands of Pilsen, non-alcoholic and Malzbier beers were used, in can and amber bottle. For determination of folates (folic acid - FA, 10-methyl-folic acid - 10Methyl, 5-methyltetrahydrofolate
Publicado em: 2010
-
7. Alcoolemia em vítimas fatais de acidentes de trânsito no Rio Grande do Norte empregando cromatografia em fase gasosa - head space
Alcohol is one of the few psychotropic drugs that their consumption has admitted legally and sometimes encouraged by the society. Studies show alcohol as the highest consumption of drugs among young people and society in general, probably because of its availability and easy access. The abuse causes public health problems, which was closely related to the vi
Publicado em: 2008
-
8. Preliminary study of the influence of CO2 extraction conditions on the ester, aldehyde, ketone and hydrocarbon content of grape bagasses from jam production
The main objective of this work was to assess the influence of temperature and pressure on the chemical characteristics of the essential oil obtained from CO2 extraction of grape bagasses in the production of jam. The experiments were performed in a laboratory-scale unit, where the effect of temperature (290 and 303 K) and pressure (15 and 25 Mpa) was invest
Brazilian Journal of Chemical Engineering. Publicado em: 2007-12
-
9. Aplicação da fotocatálise heterogênea para degradação de benzeno e fenol em um reator contínuo do tipo labirinto
Neste trabalho, foi realizado o estudo da cinética das degradações fotocatalíticas de benzeno e de fenol, em solução aquosa, com concentrações iniciais de cerca de 30 e 50 mgL-1, respectivamente. Empregou-se um reator Slurry em bateladas, tendo como fonte de irradiação lâmpadas compactas de luz negra e vapor de mercúrio. O catalisador utilizado f
Publicado em: 2007
-
10. COMPARISON BETWEEN CHROMATOGRAPHIC, USING GC-ECD, GC-FPD AND GC-MS, AND SPECTROPHOTOMETRIC METHODS TO DETERMINATE DITHIOCARBAMATES IN LETTUCE / COMPARAÇÃO ENTRE MÉTODOS CROMATOGRÁFICOS, EMPREGANDO GC-ECD, GC-FPD E GC-MS, E ESPECTROFOTOMÉTRICO PARA DETERMINAÇÃO DE DITIOCARBAMATOS EM ALFACE
Brazil is the third largest market for pesticide sales in the world, with almost 400 active ingredients registered in the country, including five dithiocarbamates. This pesticide class consists of very important protective nonsystemic fungicides with broad-spectrum activity registered for the control of fungal deseases on a large variety of crops. Due to its
Publicado em: 2005
-
11. Monte Carlo simulation of activity measurements by means of 4pb-g coincidence system
The methodology for simulating all detection processes in a 4pb-g coincidence system by means of the Monte Carlo technique is described. The goal is to predict the behavior of the observed activity as a function of the 4pb detector efficiency. In this approach, the information contained in the decay scheme is
Brazilian Journal of Physics. Publicado em: 2004-09
-
12. Desenvolvimento de metodos analiticos para determinação de nitrato, nitrito e n-nitrosaminas em produtos carneos
Nitrosamines are N-nitroso compounds formed in certain foods by the reaction of a nitrosating agent, derived from either nitrite salts or nitrogen oxide, with a substance having an amino group. The majority of nitrosamines tested in animals are carcinogenic, mutagenic, teratogenic and act transplacentally. This work describes analytical methods for the deter
Publicado em: 2004