Instrument for the micro-chemical analysis of solids
A Cambridge Scientific Instrument Company "Microscan" electron probe microanalyzer based on a design by Peter Duncumb.[1] This model is housed at the Cambridge Museum of Technology
An electron microprobe (EMP), also known as an electron probe microanalyzer (EPMA) or electron micro probe analyzer (EMPA), is an analytical tool used to non-destructively determine the chemical composition of small volumes of solid materials. It works similarly to a scanning electron microscope: the sample is bombarded with an electron beam, emitting x-rays at wavelengths characteristic to the elements being analyzed. This enables the abundances of elements present within small sample volumes (typically 10-30 cubic micrometers or less) to be determined,[2] when a conventional accelerating voltage of 15-20 kV is used.[3] The concentrations of elements from lithium to plutonium may be measured at levels as low as 100 parts per million (ppm), material dependent, although with care, levels below 10 ppm are possible.[4] The ability to quantify lithium by EPMA became a reality in 2008.[5]
^Cosslett, V. E., and P. Duncumb. "Micro-analysis by a flying-spot X-ray method." Nature 177, no. 4521 (1956): 1172-1173.
^Wittry, David B. (1958). "Electron Probe Microanalyzer", US Patent No 2916621, Washington, DC: U.S. Patent and Trademark Office
^Merlet, C.; Llovet, X. (2012). "Uncertainty and capability of quantitative EPMA at low voltage–A review". IOP Conference Series: Materials Science and Engineering. 32 (2): 012016. doi:10.1088/1757-899X/32/1/012016.
^Donovan, J.; Lowers, H.; Rusk, B. (2011). "Improved electron probe microanalysis of trace elements in quartz" (PDF). American Mineralogist. 96 (2–3): 274–282. Bibcode:2011AmMin..96..274D. doi:10.2138/am.2011.3631. S2CID 15082304.[permanent dead link]
^Fukushima, S.; Kimura, T.; Ogiwara, T.; Tsukamoto, K.; Tazawa, T.; Tanuma, S. (2008). "New model ultra-soft X-ray spectrometer for microanalysis". Microchim Acta. 161 (3–4): 399–404. doi:10.1007/s00604-007-0889-6. S2CID 94191823.
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An electronmicroprobe (EMP), also known as an electron probe microanalyzer (EPMA) or electron micro probe analyzer (EMPA), is an analytical tool used...
with a scanned electron probe Scanning electron microscope (SEM) which is similar to STEM, but with thick samples Electronmicroprobe similar to a SEM...
A microprobe is an instrument that applies a stable and well-focused beam of charged particles (electrons or ions) to a sample. When the primary beam...
8600 electronmicroprobe analyzer (EPMA) were used to chemically analyze zircon. It is used to analyze the chemical composition of material. Electron beams...
Historically, EDS was used with the SEM while WDS was used with the electronmicroprobe analyzer (EMPA). Today, EDS and WDS is used with both the SEM and...
optical or X-ray methods, and detailed chemical analysis using an electronmicroprobe is required. Glaucophane to riebeckite form yet another solid solution...
in the laboratory are through optical microscopy and by using an electronmicroprobe. In an optical mineralogy analysis, petrologists analyze thin sections...
ISSN 1050-2947. S2CID 119233168. S. J. B. Reed (2005). ElectronMicroprobe Analysis and Scanning Electron Microscopy in Geology. Cambridge University Press...
Coupled Plasma Mass Spectrometry (LA-ICPMS), Scanning Electron Microscopy (SEM) and electronmicroprobe analysis (EMPA). If there is a vapor bubble present...
speciation in S-bearing minerals: New constraints by a combination of electronmicroprobe analysis and DFT calculations with special reference to sodalite-group...
fine-grained rock using optical mineralogy, X-ray crystallography, and electronmicroprobe has determined that the boulders consist of mud, fine silt and clay...
optical or X-ray methods, and detailed chemical analysis using an electronmicroprobe is required. There is a solid solution series between hornblende...
(thermal) of burnup and has been examined with a scanning electron microscope using electronmicroprobe attachment. The lighter the pixel in the right hand...
structural information. Unlike other methods of microprobe analysis which involve ions or electrons, the LMMS microproble fires an ultraviolet pulse...
ultraviolet range.: 225–226 Other techniques are X-ray fluorescence, electronmicroprobe analysis atom probe tomography and optical emission spectrography...
isotope geochemistry). Geochemists often use mass spectrometry and electronmicroprobe analysis to understand the pre-eruption history of volcanic rocks...
structure are critical to understanding the origin of the rock. Electronmicroprobe or atom probe tomography analysis of individual grains as well as...
tephrochronology requires accurate geochemical fingerprinting (usually via an electronmicroprobe). An important recent advance is the use of LA-ICP-MS (i.e. laser...
Science Building is the university's electronmicroprobe lab. This is West Virginia's only electronmicroprobe lab. The Alexander Fine Arts Center, home...
phase does occur; resulting cryptoperthite can best be observed in electronmicroprobe images. In addition to its presence in the groundmass of felsic rocks...
2018, six samples of rainbow lattice sunstone were studied using electronmicroprobe analysis, X-ray diffraction analysis, and laser Raman spectroscopy...
Portland Cement. London: E. & F.N. Spon. Rayment, D. L. (1986). "The electronmicroprobe analysis of the C-S-H phases in a 136 year old cement paste". Cement...
of microscopic details of rocks. Similar to scanning electron microscopes, electronmicroprobes can be used in petrology to observe the condition that...
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