Elemental X-ray mapping of cementitious phases using an energy-dispersive spectrometer in the scanning electron microscope

1978 ◽  
Vol 7 (3) ◽  
pp. 145-147 ◽  
Author(s):  
P. Barnes ◽  
N. T. Moore ◽  
S. L. Sarkar
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Techniques for microdrop analysis of fluids (sweat, saliva, urine) with an energy-dispersive X-ray spectrometer on a scanning electron microscope

1978 ◽  
Vol 234 (3) ◽  
pp. F255-F259
Author(s):  
P. M. Quinton
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Quantitative Methods ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
X Ray ◽  
Low Concentrations ◽  
Biological Interest ◽  
Wide Range ◽  
Scanning Electron

Volumes of 10(-10) liter of sweat, saliva, and urine were analyzed with an energy-dispersive spectrometer (EDS) X-ray analyzer on a standard scanning electron microscope (SEM). Results of the EDS analysis of diluted and undiluted samples were verified by comparison with results of analyses of the same sample prepared by conventional quantitative methods. Except for Cl in concentrated urines and Mg in low concentrations, good agreement was found between the methods. The analysis provides quantitation of most elements of biological interest present in concentrations of about 1 mM, while it demonstrates good linearity (r greater than 0.99) throughout a wide range of commonly encountered biological concentrations. Reproducibility of the analysis is on the order of 2% and the minimal determinable concentration is generally between 0.5 and 1.0 mM for S, P, K, and Ca and slightly more than 1.0 mM for Mg.

PHAX-SCAN: Functional integration of a Scanning Electron Microscope and an energy-dispersive x-ray analyser

1989 ◽  
Vol 47 ◽  
pp. 56-57
Author(s):  
Marc H. Peeters ◽  
Max T. Otten
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
Functional Integration ◽  
Energy Dispersive ◽  
X Rays ◽  
X Ray ◽  
High Speed Analysis ◽  
Scanning Electron

Over the past decades, the combination of energy-dispersive analysis of X-rays and scanning electron microscopy has proved to be a powerful tool for fast and reliable elemental characterization of a large variety of specimens. The technique has evolved rapidly from a purely qualitative characterization method to a reliable quantitative way of analysis. In the last 5 years, an increasing need for automation is observed, whereby energy-dispersive analysers control the beam and stage movement of the scanning electron microscope in order to collect digital X-ray images and perform unattended point analysis over multiple locations.The Philips High-speed Analysis of X-rays system (PHAX-Scan) makes use of the high performance dual-processor structure of the EDAX PV9900 analyser and the databus structure of the Philips series 500 scanning electron microscope to provide a highly automated, user-friendly and extremely fast microanalysis system. The software that runs on the hardware described above was specifically designed to provide the ultimate attainable speed on the system.

scholarly journals Characterizing Severely Plastically Deformed Materials Using Transmission Kikuchi Diffraction and Energy Dispersive X-ray Spectroscopy in the Scanning Electron Microscope

2013 ◽  
Vol 19 (S2) ◽  
pp. 692-693
Author(s):  
P. Trimby
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Karakteristik Hasil Proses Nitridisasi Besi Tuang Nodular Temperatur 5500C pada Waktu Penahanan 2 Jam, 4 Jam, 6 Jam

2021 ◽  
Vol 12 (1) ◽  
pp. 13-18
Author(s):  
Wayan Sujana
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive ◽  
Fluidised Bed ◽  
X Ray ◽  
Scanning Electron

Nitridisasi merupakan suatu proses perlakuan panas termokimia yang dimana nitrogen dan amonia didifusikan kepermukaan material (ferro and non-ferro) pada temperatur 500-6000C sehingga membentuk pengerasan kulit akibat terbentuknya lapisan nitrida paduan pada permukaan. Namun pengerasan permukaan ditentukan oleh paduan dari material yang dilakukan proses nitridisasi.Tujuan Nitridisasi adalah untuk memperbaiki ketahanan aus, meningkatkan ketahanan lelah, dan memperbaiki ketahanan tehadap korosi. Proses nitidisasi ini juga dapat mengganti jenis perlakuan panas lain yang menekankan performance yang baik. Pada penelitian ini akan memanfaatkan besi cor nodular yanga akan diproses nitridisasi menggunakan fluidised bed furnace. Pada penelitian ini menggunakan pengujian distribusi kekerasan (metode vickers) untuk mengamati sejauh mana nitrogen berdifusi pada permukaan spesimen, dan pengamatan struktur mikro dengan scanning electron microscope, energy dispersive X-Ray spectroscopy (SEM-EDS).Penelitian ini akan memberikan informasi fenonema proses nitridisasi pada besi cor nodular sehingga mendapatkan suatu analisis yang sesuai dengan metode sehingga menghasilkan kualitas kekerasan permukaan yang baik.

scholarly journals Calorimetric study on Bi-Cu-Sn alloys

2019 ◽  
Vol 38 (2019) ◽  
pp. 541-546
Author(s):  
Jolanta Romanowska
Keyword(s):  
Differential Scanning Calorimetry ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Temperature Interval ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
Calorimetric Study ◽  
Calorimetric Investigation ◽  
Scanning Calorimetry ◽  
Scanning Electron

AbstractThe paper presents results of calorimetric investigation of the Bi-Cu-Sn system by means of differential scanning calorimetry (DSC) at the temperature interval 25-1250∘C, Values of liquidus, solidus and invariant reactions temperatures, as well as melting enthalpies of the selected alloys were determined. Microstructure investigation of the alloys were performed by the use of a scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer (EDS).

scholarly journals Effect of Cerium on the Microstructure and Inclusion Evolution of C-Mn Cryogenic Vessel Steels

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5262
Author(s):  
Liping Wu ◽  
Jianguo Zhi ◽  
Jiangshan Zhang ◽  
Bo Zhao ◽  
Qing Liu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Heterogeneous Nucleation ◽  
Energy Dispersive Spectrometer ◽  
Energy Dispersive ◽  
Vessel Steel ◽  
Cryogenic Vessel ◽  
Central Segregation ◽  
Scanning Electron

The effects of Cerium (Ce) were studied on the casting slab quality, microstructure, and inclusion evolution of cryogenic vessel steel. An optical metallographic microscope, scanning electron microscope, energy dispersive spectrometer, and Thermo-calc thermodynamic software were used for characterization and analysis. The results indicated that the central segregation was significantly improved after adding Ce and reached the lowest level when the content of Ce was 0.0009 wt.%. Meanwhile, the presence of Ce reduces the size of ferrite and improves pearlite morphology. Ce also enables the modification of Al2O3 and MnS + Ti4C2S2 inclusions into ellipsoid CeAlO3 and spherical Ce2O2S + Ti4C2S2 composite inclusions, respectively, which are easier to remove. The formed Ce2O2S inclusions are fine and can work as heterogeneous nucleation points to refine the microstructure of steel.

scholarly journals Biosorption of lead ions by exopolysaccharide producing Azotobacter sp.

2021 ◽  
Vol 42 (1) ◽  
pp. 40-50
Author(s):  
P. Dhevagi ◽  
◽  
S. Priyatharshini ◽  
A. Ramya ◽  
M. Sudhakaran ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Response Surface ◽  
Functional Groups ◽  
Contact Time ◽  
Sewage Water ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Aim: Removal of lead from wastewater using Azotobacter species and optimisation of various parameters to maximise the adsorption of lead by response surface methodology as a tool. Methodology: The bacterial isolate UBI-7 recovered from sewage water irrigated soil was examined for its biosorption potential towards lead. The lead removal efficiency of Azotobacter salinestris was studied with respect to metal concentration (50-250 mg l-1), contact time (24-120 hrs), and pH (4-8).Using response surface methodology, these factors were optimized and R2 value obtained was 0.9710 for lead ions, which indicates the validity of the model. Observation with Fourier Transform Infrared (FTIR), Scanning Electron Microscope imaging (SEM) and Energy Dispersive X-ray Spectroscopic analysis (EDX) were carried out to confirm lead biosorption by Azotobacter salinestris. Results: The lead tolerant bacterium isolated from sewage water irrigated soil (UBI-7) was recognized as Azotobacter salinestris by 16S rRNA based gene sequence analysis. The highest removal percentage of Pb (61.54) was 50 mg l-1 in 72 hrs equilibration period. Interaction effect between different levels of Pb and different contact time of the solution were found to be significant. Lead biosorption by the organism was confirmed by the changes in stretching intensities of functional groups as well as appearance of strong OH stretching at 3291.69 cm-1. Images obtained from Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopic studies of the bacteria (UBI-7) before and after biosorption clearly indicated lead adsorption. Interpretation: Current study proves that the functional groups of Azotobacter salinestris are involved in lead biosorption from aqueous solution which was confirmed through FTIR.EDX analysis also elucidated the lead absorption by the bacterial cells. Hence, this could be effectively utilized for decontamination of lead from the polluted environment. Key words: Azotobacter salinestris, Biosorption, Lead, Response surface methodology

Sign in / Sign up

Export Citation Format

Share Document