Trace Element Analysis in Geochemical Systems by STEM\EDS
نویسندگان
چکیده
منابع مشابه
Trace Element Analysis in Geochemical Systems by STEM/EDS
Until recently, measurement of trace elements with ppm concentrations has been inaccessible to STEM EDS. Development of fast SDD detectors with solid angles > 1/2 steradian and faster processors are now making such measurements a reality. STEM EDS measurements already have a low brehmsstrahlung background owing to thin samples. However, the combination of high beam currents required to attain s...
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Trace metals occur naturally in rocks and soils, but increasingly higher quantities of metals are being released into the environment by anthropogenic activities. Metals are chemically very reactive in the environment, which results in their mobility and bioavailability to living organisms. People can be exposed to high levels of toxic metals by breathing air, drinking water, or eating food tha...
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Present knowledge of human bodily contents and concentrations in blood, urine, and hair of 11 essential trace elements and 17-22 nonessential inert or toxic trace elements is reviewed and summarized. Analyses of trace elements are applicable as diagnostic aids and indices for therapy in a number of clinical conditions. Techniques are not difficult, and analyses will probably become more or less...
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ژورنال
عنوان ژورنال: Microscopy and Microanalysis
سال: 2014
ISSN: 1431-9276,1435-8115
DOI: 10.1017/s1431927614010149