Designing the Optimal Quantitative Electron Probe X-ray Microanalysis Measurement
نویسندگان
چکیده
منابع مشابه
Quantitative Electron Probe Microanalysis
The recognition and understanding of the role of the microstructure in controlling the macroscopic behavior of a material has been a major theme of science and technology throughout the history of NBS/NIST. In materials science, the late 19th century saw the development of the sample preparation procedures we know today as “metallography” and “materialography,” and the emergence of optical micr...
متن کاملBarriers to Quantitative Electron Probe X-Ray Microanalysis for Low Voltage Scanning Electron Microscopy
Low voltage x-ray microanalysis, defined as being performed with an incident beam energy ≤5 keV, can achieve spatial resolution, laterally and in depth, of 100 nm or less, depending on the exact selection of beam energy and the composition of the target. The shallow depth of beam penetration, with the consequent short path length for x-ray absorption, and the low overvoltage, the ratio of beam ...
متن کاملQuantitative Electron-probe Microanalysis and WDS Background Measurement
The accuracy of electron-probe microanalysis (EPMA) by wavelength-dispersive spectrometry (WDS) depends critically on spectrometer alignment, specimen positioning, pulse-height (PHA) discrimination, and deadtime correction, but also on the accurate measurement of characteristic x-ray intensities (i.e., “peak”) and continuum (i.e., “background”) which form the k-ratio that is converted by correc...
متن کاملCharacterization of atmospheric particles by electron probe X-ray microanalysis.
Microchemical glass standards were used to validate a quantitation method based on peak-to-background (P/B) ratios from electron probe x-ray microanalysis spectra. This standardless method was applied to the determination of concentrations of individual particles from Malpha or Lalpha lines, as well as from Kalpha lines. The algorithm was tested on particulate glass samples for diameters rangin...
متن کاملThe quantitative measurement of electrolyte elements in nuclei of maturing erythrocytes of chick embryo using electron-probe X-ray microanalysis.
Na, K and Cl measurements have been made on frozen sections of chick red blood cells throughout embryonic development, using electron-probe microanalysis. There is an apparent fluctuation in the levels of these elements during maturation, although the Na/K ratio remains fairly constant. The nuclear Na concentration resembles that of the cytoplasm, rather than that of the medium, at all stages. ...
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ژورنال
عنوان ژورنال: Microscopy and Microanalysis
سال: 2013
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927613008234