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Published online by Cambridge University Press: 06 March 2019
For X-ray fluorescence determination of light elements, vacuum X-rays spectrometers are usually used to increase the transmission of the optical path for the soft X-radiation. A vacuum of about 50μHg is required for the determination of elements with atomic numbers down to 9(F).
A vacuum system however, complicates the sample presentation mechanism of a spectrometer; it requires vacuum seals, additional fastening of the flow detector window and, as a results, increases the price of the spectrometer.