Comparison of Dual-Channel Wavelength and Secondary-Target Energy-Dispersive X-Ray Spectrometers

1986 ◽  
Vol 30 ◽  
pp. 225-236
Author(s):  
John F. Croke ◽  
Joseph A. Nicolosi
Keyword(s):  
List Type ◽  
Qualitative And Quantitative Analysis ◽  
X Ray ◽  
Qualitative And Quantitative ◽  
The Past ◽  
Dual Channel ◽  
Target Energy ◽  
Overall Performance ◽  
Channel Wavelength ◽  
Speed Accuracy

Over the past 30 years, X-ray fluorescence spectrometry has become one of the more valuable methods for the qualitative and quantitative analysis of materials. Today, there are many methods of instrumental analysis available, and among the factors that will be taken into account in the method of selection are: -Accuracy-Range of application-Speed-Sensitivity-ReliabilityNo one technique can provide all of the features that a given analyst requires. XRF does offer good overall performance over the widest range of elements. Speed, accuracy, and versatility are among the features that have made XRF the method of choice for over 15,000 laboratories worldwide.

Attraction of prey

2018 ◽  
Author(s):  
John D. Horner ◽  
Bartosz J. Płachno ◽  
Ulrike Bauer ◽  
Bruno Di Giusto
Keyword(s):  
Visual Cues ◽  
Synergistic Action ◽  
Carnivorous Plants ◽  
Future Research ◽  
Acoustic Cues ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
The Past ◽  
The Cost ◽  
Prey Attraction

The ability to attract prey has long been considered a universal trait of carnivorous plants. We review studies from the past 25 years that have investigated the mechanisms by which carnivorous plants attract prey to their traps. Potential attractants include nectar, visual, olfactory, and acoustic cues. Each of these has been well documented to be effective in various species, but prey attraction is not ubiquitous among carnivorous plants. Directions for future research, especially in native habitats in the field, include: the qualitative and quantitative analysis of visual cues, volatiles, and nectar; temporal changes in attractants; synergistic action of combinations of attractants; the cost of attractants; and responses to putative attractants in electroantennograms and insect behavioral tests.

X-Ray Fluorescence in Cotton Modification Research

1964 ◽  
Vol 8 ◽  
pp. 456-461
Author(s):  
Donald Mitcham ◽  
Biagio Piccolo ◽  
Verne W. Tripp ◽  
Robert T. O’Connor
Keyword(s):  
Quantitative Analysis ◽  
Cotton Textile ◽  
Qualitative And Quantitative Analysis ◽  
X Ray ◽  
Textile Materials ◽  
Qualitative And Quantitative ◽  
Chemically Modified ◽  
Elapsed Time

AbstractThe application of X-ray fluorescence to the qualitative and quantitative analysis of chemically modified cotton textile materials is described. The scope and flexibility of the technique have permitted the determination of more than 20 elements with, greatly reduced elapsed time compared with the corresponding spectroscopic or wet methods. Precautions to be observed in preparing standards are discussed. Results of the analysis of typical modifications and their significance in the development of cottons for specific uses are described.

Computed Tomography Experiments on a Laboratory Multipurpose Diffractometer

2017 ◽  
Vol 742 ◽  
pp. 666-670
Author(s):  
Natalia Dadivanyan ◽  
Detlev J. Götz ◽  
Detlef Beckers ◽  
Fabio Masiello
Keyword(s):  
Computed Tomography ◽  
Heavy Element ◽  
High Energy ◽  
Low Energy ◽  
Qualitative And Quantitative Analysis ◽  
X Ray ◽  
Qualitative And Quantitative ◽  
Energy Application ◽  
Solid Compounds ◽  
3D Information

Applications of soft (Co and Cu X-ray tube) and hard (Ag X-ray tube) radiation in computed tomography experiments on a laboratory X-ray diffractometer are presented. Using low energy (<10 keV) X-ray sources provide the possibility to investigate objects made of light (organic) materials in more detail compared to the high energy application. In case of metal or heavy element containing composites high energy (~20 keV) X-ray sources allow to obtain full 3D information on the samples without destroying them. These measurements allow both qualitative and quantitative analysis of porous materials, samples with oriented components, and solid compounds.

Qualitative and Quantitative Analysis of Stacking Disorder in α-and β-SiC by X-ray Diffraction and Structure Modeling

1995 ◽  
Vol 410 ◽  
Author(s):  
Bogdan Palosz ◽  
Svetlana Stel'makh ◽  
Stanislaw Gierlotka
Keyword(s):  
Quantitative Analysis ◽  
Model Parameters ◽  
Qualitative And Quantitative Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Qualitative And Quantitative ◽  
Poisson Function ◽  
Diffraction Patterns ◽  
Computer Generation ◽  
Stacking Disorder

ABSTRACTA method of analysis of disordering in α- and β-SiC polycrystals by numerical modeling, and a simulation of X-ray diffraction profiles are presented. The diffraction patterns of nonperiodic structures were simulated for models of 2000 layer fragments of the structure. Computer generation of the models was based on the Poisson function describing the size distribution of the domains of basic polytypes and faults. The models were quantified by a set of input probability parameters describing relative frequencies of the occurrence of the domains of polytypes and faults. Implementation of a correlation parameter that characterizes coherence of sequential domains of a given polytype assures a good reproducibility of the simulated diffraction profiles obtained for the same set of the model parameters. Based on this method, a quantitative analysis of disordering in polycrystals of SiC annealed in the temperature range 1100–2200 °C was performed.

Advancements in practical and scientific bioanalytical approaches to metabolism studies in drug development

Bioanalysis ◽  
2021 ◽  
Author(s):  
Dipali Sonawane ◽  
Anuradha Reddy ◽  
Tarang Jadav ◽  
Amit K Sahu ◽  
Rakesh K Tekade ◽  
...  
Keyword(s):  
Drug Development ◽  
Development Programs ◽  
Qualitative And Quantitative Analysis ◽  
Detailed Understanding ◽  
Qualitative And Quantitative ◽  
The Past ◽  
Recent Advancement ◽  
Bioanalytical Techniques

Advancement in metabolism profiling approaches and bioanalytical techniques has been revolutionized over the last two decades. Different in vitro and in vivo approaches along with advanced bioanalytical techniques are enabling the accurate qualitative and quantitative analysis of metabolites. This review summarizes various modern in vitro and in vivo approaches for executing metabolism studies with special emphasis on the recent advancement in the field. Advanced bioanalytical techniques, which can be employed in metabolism studies, have been discussed suggesting their particular application based on specific study objectives. This article can efficiently guide the researchers to scientifically plan metabolism studies and their bioanalysis during drug development programs taking advantage of a detailed understanding of instances of failure in the past.

Qualitative Phase Analysis Using an X-Ray Powder Diffractometer

1980 ◽  
Vol 24 ◽  
pp. 91-97
Author(s):  
W. N. Schreiner ◽  
C. Surdukowski ◽  
R. Jenkins
Keyword(s):  
Qualitative Analysis ◽  
Phase Analysis ◽  
Powder Diffraction ◽  
X Ray ◽  
Qualitative And Quantitative ◽  
The Past ◽  
Quantitative Analyses ◽  
Improved Performance ◽  
Qualitative Phase ◽  
Self Consistency

During the past three years we have undertaken the development of a complete X-Ray Powder Diffraction, facility with the goal of fully integrating experimental and analytical procedures. Such an approach potentially offers substantially improved performance over previously existing systems by virtue of its internal self-consistency and it opens the possibility of significantly extending analytic procedures for both qualitative and quantitative analyses. Our work to date has resulted in improved performance and significant extensions in both areas, and today I will report on those advances in the area of qualitative analysis.

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