X-ray fluorescence spectrometer

X-ray or gamma ray systems or devices – Specific application – Fluorescence

Reexamination Certificate

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Reexamination Certificate

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07949093

ABSTRACT:
An X-ray fluorescence spectrometer for measuring the concentration of sulfur contained in a sample (S), by irradiating the sample (S) with primary X-rays from an X-ray tube (11), monochromating fluorescent X-rays emitted from the sample (S) with a spectroscopic device, and detecting monochromated fluorescent X-rays with an X-ray detector. The spectrometer includes the X-ray tube (11) having a target with an element including chromium, an X-ray filter (13) disposed on a path of travel of X-rays between the X-ray tube (11) and the sample (S) and having a predetermined transmittance for Cr—Kα line from the X-ray tube (11) and made of a material which is an element of which absorption edges do not exist between energies of S—Kα line and Cr—Kα line, and a proportional counter (18) having a detector gas containing a neon gas or a helium gas.

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patent: 2003-344544 (2003-12-01), None
patent: 2006-030018 (2006-02-01), None
Translation for JP 2006-030018 published Feb. 2, 2006.
Translation for JP 2003-344544 published Dec. 3, 2003.
Barlow, et al., “Rapid determination of sulphate for cement mill control,” World Cement, Apr. 1986, p. 91-93, vol. 17, No. 3.
Bearden, “X-Ray Wavelengths,” Reviews of Modern Physics, Jan. 1967, p. 78-124, vol. 39, No. 1.
Korean Office Action issued in Korean Application No. 10-2008-7027449 dated Dec. 28, 2010.

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