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This type of instrument is commonly used for portable quality control screening applications, such as testing toys for lead Pb content, sorting scrap metals, and measuring the lead content of residential paint.
Crystals containing heavy atoms can diffract well, but also fluoresce more in the higher energy region, causing interference.
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The obvious disadvantage is relatively long analysis time, particularly when many elements are being analysed, not only because the elements are measured in sequence, but also because a certain amount of time is taken in readjusting the monochromator geometry between measurements.
In analysis, the fluorescent X-rays emitted by the sample are directed into a -based.
Each of these transitions yields a fluorescent photon with a characteristic energy equal to the difference in energy of the initial and final orbital.
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