Sulfide Determination
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Determination of 3,4,5-Trihydroxybenzoic Acid Exploiting a Visible-Light-Driven Photoelectrochemical Platform: Application in Wine and Tea Samples
The present work is based on the development and application of a photoelectrochemical method for the amperometric determination of 3,4,5-trihydroxybenzoic acid in different samples. The method is based on the use of a photoelectrochemical platform based on a glass slide coated with fluorine-doped tin oxide, which has been modified with cadmium sulfide and p
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Reduced Graphene Oxide-Cadmium Sulfide Quantum Dots Nanocomposite Based Dispersive Solid Phase Microextraction for Ultra-Trace Determination of Carbamazepine and Phenobarbital
This research presents a fast, sensitive, and selective ultrasound-assisted dispersive solid phase microextraction technique for simultaneous preconcentration and determination of ultra-trace amount of carbamazepine and phenobarbital. Reduced graphene oxide sheets decorated with cadmium sulfide quantum dots was synthesized, characterized, and used as a high
J. Braz. Chem. Soc.. Publicado em: 2021-04
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3. FAST DETERMINATION OF THE SULFUR SPECIES IN SOLID PHASE SYSTEMS BY A TPO-IR METHOD
Qualitative and quantitative assessment of total sulfur and sulfur species in solid phase is necessarily important for development of effective desulfurization methods, reduction of environmental pollution, and prevention of catalyst poisoned. In this work, TPO-IR (Temperature Programmed Oxidation- Infrared) method was used for rapid determination of sulfur
Quím. Nova. Publicado em: 2021-01
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4. Evaluation of Corrosion Caused by the use of In Natura Biogas in Steam Generator Boilers of Carbon Steel Structural Elements
This work evaluates the corrosion process caused by the presence of hydrogen sulfide in the biogas in natura, in steels commonly used in the construction of steam generator boilers, simulating conditions close to those found on the real application of these materials, exposing the test bodies directly to biogas in natura, flame of combustion and gases result
Mat. Res.. Publicado em: 10/04/2017
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5. Determination of gold by high-resolution continuum source atomic absorption spectrometry with chemical vapor generation
Avaliou-se o potencial analítico da geração de vapor químico e da espectrometria de absorção atômica com fonte contínua de alta resolução com atomização em tubo de quartzo na determinação de ouro. As espécies voláteis de ouro foram formadas pela reação com tetraidroborato(III) de sódio na presença de ácido clorídrico. Investigou-se a in
J. Braz. Chem. Soc.. Publicado em: 2013-05
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6. Isolation and characterization of a microorganism involved on autotrophic denitrification by sulfide oxidation in a vertical fixed-bed reactor / Isolamento e caracterização de microrganismo envolvido na desnitrificação autrófica pela oxidação de sulfeto em reator vertical de leito fixo
The aim of this study was to evaluate the community involved on autotrophic denitrification by sulfide oxidation applied to the post-treatment of anaerobic effluents. The enrichment of the bacterial community and autotrophic denitrifier community was accessed in three immobilized bed reactors operated at the conditions of autotrophic reduction of nitrate, au
Publicado em: 2010
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7. Desenvolvimento e caracterização de sensores quimicamente modificados para análise de sulfeto / Development and characterization of chemically modified sensors for analysis of sulfide
The developmental impulse of the present time has caused a continuous degradation of the environment, which increases the need of monitoring the contaminant levels launched in the natural water courses and industrial effluents. In this context, it is crucial to develop new methodologies of determination and quantification of various types of pollutants, with
Publicado em: 2010
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8. Modelagem e simulação de circuito de moagem através da determinação dos parâmetros de quebra e da energia específica de fragmentação
The optimization of industrial grinding circuits has been accomplished with success,using mathematical models that relate industrial data with breakage parameters and specific energy of fragmentation determined in the laboratory. In this study, a classical example of the use of this methodology is presented, where the breakage parameters and data for the spe
Publicado em: 2009
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9. Mercurio e sulfetos volatilizaveis por acidos na bacia do Rio Jundiai, SP / Mercury and acid-volatile sulfides in the Jundiai River basin, SP
The present work describes environmental aspects related to Jundiaí River and Piraí Stream, both belonging to Jundiaí River basin, which is a sub-basin of the Piracicaba/Capivari/Jundiaí Watershed Committee in São Paulo, Brazil. This work generated an important and unpublished inventory regarding the region at the beginning of this century, which will b
Publicado em: 2009
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10. Avaliação da produção de odor na estação de tratamento de esgoto Paranoá e seus problemas associados
The Federal District of Brazil has been suffering problems of emanations of odors proceeding from sewage treatment plants (STP). For this reason, this work has the objective of evaluating the production of odor in the Paranoá sewage treatment plant (Paranoá STP), in Federal District, and its associated problems, employing hydrogen sulfide (H2S) as an indic
Publicado em: 2007
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11. DESENVOLVIMENTO DE PROCEDIMENTOS ALTERNATIVOS DE PREPARO E DE DETERMINAÇÃO DE METAIS PESADOS EM FÁRMACOS TRICÍCLICOS
In this work, sample preparation and determination methods described in pharmacopeias were evaluated and alternative methods using sample decomposition in closed vessels and determination by atomic spectrometrometry were proposed as alternative. Tricyclic drugs (carbamazepine, amitryptyline hydrochloride and imipramine hydrochloride) were used to evaluate th
Publicado em: 2007
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12. Critérios para avaliação da qualidade de sedimentos - Estudo de caso: Sub-bacia do Ribeirão Espírito Santo, afluente do Rio São Francisco / Criteria for evaluating sediment quality - Case Study: Sub-Watershed of Espírito Santo Stream; Affluent of the São Francisco River
Sediment Quality Values Guidelines (SQVG) have been used for evaluating ecological risk associated with the sediment contamination for benthonic organisms. The main objective of this work was to develop methodologies and to collect data that allowed the application of SQVG for the following metals: Cd, Cu, Pb, Ni and Zn. The location chosen for the case stud
Publicado em: 2007