Chemical analysis of size-tailored magnetic colloids using slurry nebulization in ICP-OES

2011 ◽  
Vol 97 (2) ◽  
pp. 182-187 ◽  
Author(s):  
Marcelo H. Sousa ◽  
Geraldo J. da Silva ◽  
Jérôme Depeyrot ◽  
Francisco A. Tourinho ◽  
Luiz F. Zara
Keyword(s):  
Chemical Analysis ◽  
Icp Oes ◽  
Magnetic Colloids ◽  
Slurry Nebulization

scholarly journals Chemical analysis of mortars of archaeological samples from Mediana locality, Serbia

2019 ◽  
Vol 51 (2) ◽  
pp. 233-242
Author(s):  
Maja Stankovic ◽  
Nenad Krstic ◽  
Dragan Djordjevic ◽  
Nemanja Anastasijevic ◽  
Vojislav Mitic ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Archaeological Site ◽  
Large Contribution ◽  
Icp Oes ◽  
River Sand ◽  
Hydraulic Lime ◽  
Aluminum Oxides ◽  
Lime Mortar ◽  
Hydraulic Lime Mortar

Mineralogical and chemical composition of mortar from the floor, ceiling and wall of Stibadium B, from the archaeological site of Mediana (Serbia) have been analysed using ICP-OES, F?IR and XRD-spectroscopy and chemical analysis. The results show that hydraulic lime mortar was used with crushed bricks as artificial puzzolanic aggregate. Large contribution of silicon- and aluminum-oxides, indicate the presence of quartz and phyllosilicate minerals derived from the aggregate, river sand and crushed bricks. Also, high content of Pb and Cu was observed in investigated samples.

scholarly journals AVALIAÇÃO DA ALTERABILIDADE DAS ROCHAS DA FACHADA DO MUSEU CASA DE RUI BARBOSA

2016 ◽  
Author(s):  
Daniele Pereira da Silva Dalto ◽  
Paula Ribeiro Dias Mascarenhas ◽  
Kátia Leite Mansur ◽  
Roberto Carlos da Conceição Ribeiro
Keyword(s):  
Chemical Analysis ◽  
Rio De Janeiro ◽  
Color Change ◽  
Degradation Process ◽  
Chloride Ions ◽  
Wash Water ◽  
Icp Oes ◽  
Lithological Mapping ◽  
Ornamental Stones

ResumoO Museu Casa de Rui Barbosa, cuja construção foi feita no ano de 1850, localiza-se no bairro de Botafogo na cidade do Rio de Janeiro e faz parte da Fundação Casa de Rui Barbosa tombado pelo IPHAN. O edifício que abriga o Museu foi residência de Ruy Barbosa de Oliveira que dentre outras atribuições foi um jurista, escritor e político brasileiro de grande importância para o país. Devido a importância de cunho histórico e cultural de sua residência, o objetivo do presente trabalho é a caracterização e a avaliação da alterabilidade das rochas das fachadas da Casa de Rui Barbosa por meio de ensaios não destrutivos in situ. Para tal, foram realizados ensaios de avaliação de dureza, análise química por meio da fluorescência de raios-X portátil (FRX) e colorimetria. Foi feito também o mapeamento litológico, identificação das morfologias de alteração e amostragem da água de lavagem de locais alterados para avaliação química dos sais e sujidades utilizando técnica de espectrometria ICP-OES e análise de pH. A maioria das rochas ornamentais das fachadas são, possivelmente, gnaisses leptiníticos, e alguns apresentam alterações como modificação cromática, perda de massa, fissuras e esfoliação, porém há ainda a presença de gnaisses facoidais. A análise de FRX corrobora com a hipótese das rochas serem leptinitos devido ao alto teor de silício (50- 85%) e alumínio (12-32%), além de ferro (1-5%), indicando presença de granada almandina. Foi possível observar que há uma leve alteração cromática nos corpos avaliados. A análise química das águas de lavagem apresentou teores consideráveis de íons sódio e cloro, ambos com cerca de 7 mg.L-1, que podem estar relacionados com a proximidade do Museu à Baía de Guanabara, e enxofre com valores de S-2 e SO4-2, superior a 70 mg.L-1 e 140 mg.L-1, respectivamente, podendo estar relacionado à poluição oriunda do intenso tráfego de veículos na rua em que se encontra a casa. Os resultados apontam que existe um processo de degradação contínuo destas rochas, sendo influenciado por fatores climáticos e, também, pela sua localização.Palavras Chave: rochas ornamentais, alterabilidade, Museu Casa de Rui BarbosaAbstractALTERABILITY EVALUATION OF THE ROCK FACADE FROM CASA DE RUI BARBOSA MUSEUM. Casa Rui Barbosa Museum, was built in 1850, located in Botafogo in the city of Rio de Janeiro, and part of Foundation Casa de Rui Barbosa - IPHAN. The building was the residence of Ruy Barbosa de Oliveira who among other duties was a lawyer, a writer and a politician of great importance to Brazil. Because of the importance of historical and cultural nature, the aim of this study is the evaluation of the alterability of the stones of the facades of the Casa Rui Barbosa Museum through non-destructive testing in situ, hardness evaluation, chemical analysis by fluorescence-ray portable X (FRX) and colorimetric analysis. Also the lithological mapping, identification of alterability and chemical evaluation of the salts and dirtiness of the wash water using ICP-OES spectrometry, moreover pH analysis. Most ornamental stones of the facades are possibly leptynite, and some feature changes such as color change, weight loss, cracks and exfoliation, but there is still the presence of augen gneisses. The XRF analysis supports the hypothesis that stones are leptynite due to the high silicon content (50-85%) and aluminum (12-32%), and iron (1-5%), indicating the presence of almadine garnet. A slight color change was observed in the stones. Chemical analysis of the water showed significant levels of sodium and chloride ions, both with approximately 7 mg.L-1, which may be related to the proximity of the Guanabara Bay, and high values of S-2and SO4-2, above 70 mg.L-1and 140 mg.L-1, respectively, and may be related to pollution from the heavy vehicle traffic on the street where the Museum is located. The results showed that there is a continuous degradation process of these stones, influenced by weathering and the location.Keywords: dimension stones, weathering, Casa de Rui Museum

scholarly journals TEORES DOS METAIS PESADOS Cr, Cd E Zn EM PERFIS DE SOLOS DE VEREDAS DA BACIA DO RIO DO FORMOSO, MUNICÍPIO DE BURITIZEIRO, MINAS GERAIS

2013 ◽  
Author(s):  
Priscilla Palmeiras Freitas de Moraes ◽  
Adolf Heinrich Horn
Keyword(s):  
Heavy Metals ◽  
Chemical Analysis ◽  
Environmental Quality ◽  
Minas Gerais ◽  
Soil Samples ◽  
Vertical Profiles ◽  
Icp Oes ◽  
Physical Chemical

As concentrações dos elementos Cr, Cd e Zn em amostras de solo (fração < 0,074 mm) de três veredas selecionadas na Bacia do Rio do Formoso, município de Buritizeiro, Minas Gerais, foram determinadas para obter informações com relação à qualidade ambiental dos solos destas áreas. As amostras foram coletadas em perfis verticais e preparadas para as análises físico-químicas. As leituras das concentrações dos metais foram determinadas por ICP-OES e apresentaram níveis acima do permitido pela legislação, principalmente para os elementos Cr e Cd.PALAVRAS-CHAVE: metais pesados, solos, veredas, contaminação. ABSTRACT: The concentrations of Cr, Cd and Zn in soil samples (fraction <0.074 mm) of three selected veredas in the basin of the Formoso River, Buritizeiro municipality, Minas Gerais, were determined to obtain information regarding the soils environmental quality of these areas. The samples were collected in vertical profiles and prepared for the physical-chemical analysis. The readings of concentrations of metals were determined by ICP-OES and showed levels above those permitted by law, particularly for elements Cr and Cd.KEYWORDS: heavy metals, soils, veredas, contamination.

Use of a simplified generalized standard additions method for the analysis of cement, gypsum and basic slag by slurry nebulization ICP-OES

2004 ◽  
Vol 379 (1) ◽  
pp. 104-107 ◽  
Author(s):  
Ljiljana Marjanovic ◽  
Robert I. McCrindle ◽  
Barend M. Botha ◽  
Herman J. Potgieter
Keyword(s):  
Basic Slag ◽  
Icp Oes ◽  
Standard Additions ◽  
Slurry Nebulization

scholarly journals Slurry nebulization ICP-OES for the determination of Cu, Fe, Mg, Mn and Zn

2008 ◽  
Vol 22 (3) ◽  
Author(s):  
Ntebogeng S. Mokgalaka ◽  
Taddese Wondimu ◽  
Robert I. McCrindle
Keyword(s):  
Icp Oes ◽  
Slurry Nebulization

scholarly journals Novel approach for determination of potentially toxic elements via ICP-OES in aqueous solutions of building materials with industrial byproduct addition

2019 ◽  
Vol 51 (4) ◽  
pp. 429-444
Author(s):  
Nevenka Mijatovic ◽  
Anja Terzic ◽  
Lato Pezo ◽  
Ljiljana Milicic ◽  
Aleksandra Milosavljevic ◽  
...  
Keyword(s):  
Fly Ash ◽  
Chemical Analysis ◽  
Inductively Coupled Plasma ◽  
Building Materials ◽  
Principal Component ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Limit Values

New global tendencies for waste materials reusing in building materials are imposing the request for improved performances of chemical analysis methods and the improvements of matrices used. A new method for optical emission spectrometry with inductively coupled plasma (ICP-OES) is developed and validated for the chemical analysis (35 elements: Al, Be, Cd, So, Cr, Cu, Fe, Mn, Mo, Ni, V, Mo, Zn, Pb , Bi, Si, Zr, W, As, Se, Sb, Sn, Ti, Ba, B, Ag, Mg, Ca, K, Na, S, P, Ga, In, Li) in leachate of fly ash. Validation performances and the uncertainty ?f measurement were resolved. Uncertainty ?f measurements were resolved by three routes: validation procedure, participation in proficiency testing (PT) schemes and standard method. The obtained method is a new simple and effective analyzing route for determination of undesired trace elements and their quantity comprised in leachates of fly ash, and leachates of building materials with addition of fly ash (cement binders and mortars). In order to prove its accuracy and precision, the developed method was employed on laboratory samples of cement binders and mortars. Results were compared with limit values provided in the standard. Multivariate analyses, i.e. cluster analysis and principal component analysis, were applied to establish interrelations between analyzed samples, and to certify the developed ICP-OES method.

Aspects of microanalysis in a transmission electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 510-511
Author(s):  
R. Sinclair ◽  
B.E. Jacobson
Keyword(s):  
Grain Size ◽  
Electron Beam ◽  
Electron Microscope ◽  
Chemical Analysis ◽  
Transmission Electron Microscope ◽  
Vapor Deposition ◽  
Critical Currents ◽  
X Ray ◽  
Fine Grain ◽  
Transmission Electron

INTRODUCTIONThe prospect of performing chemical analysis of thin specimens at any desired level of resolution is particularly appealing to the materials scientist. Commercial TEM-based systems are now available which virtually provide this capability. The purpose of this contribution is to illustrate its application to problems which would have been intractable until recently, pointing out some current limitations.X-RAY ANALYSISIn an attempt to fabricate superconducting materials with high critical currents and temperature, thin Nb3Sn films have been prepared by electron beam vapor deposition [1]. Fine-grain size material is desirable which may be achieved by codeposition with small amounts of Al2O3 . Figure 1 shows the STEM microstructure, with large (∽ 200 Å dia) voids present at the grain boundaries. Higher quality TEM micrographs (e.g. fig. 2) reveal the presence of small voids within the grains which are absent in pure Nb3Sn prepared under identical conditions. The X-ray spectrum from large (∽ lμ dia) or small (∽100 Ǻ dia) areas within the grains indicates only small amounts of A1 (fig.3).

Integrated morphometrical and electron energy loss image analysis in cytochemistry

1989 ◽  
Vol 47 ◽  
pp. 402-403
Author(s):  
W.C. de Bruijn ◽  
A.A.W. de Jong ◽  
C.W.J. Sorber
Keyword(s):  
Image Analysis ◽  
Acid Phosphatase ◽  
Chemical Analysis ◽  
Active Form ◽  
List Type ◽  
Type Number ◽  
Enzyme Cytochemistry ◽  
Related Data ◽  
Endogenous Peroxidase ◽  
Electron Energy Loss

One aspect of enzyme cytochemistry is, whether all macrophage lysosomal hydrolytical enzymes are present in an active form, or are activated upon stimulation. Integrated morphometrical and chemical analysis has been chosen as a tool to illucidate that cytochemical problem. Mouse peritoneal resident macrophages have been used as a model for this complicated integration of morphometrical and element-related data. Only aldehyde-fixed cells were treated with three cytochemical reactions to detect different enzyme activities within one cell (for details see [1,2]). The enzyme-related precipitates anticipated to be differentiated, were:(1).lysosomal barium and sulphur from aryl sulphatase activity,(2).lysosomal cerium and phosphate from acid phosphatase activity and(3).platinum/di-amino-benzidine( D A B) complex from endogenous peroxidase activity.

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