Patent ID: 7450685
Filing Date: 2008-11-11
Classification: G01N

Abstract:
1. An X-ray fluorescence spectrometer which comprises: an X-ray source for irradiating a sample with primary X-rays; a divergence slit for passing therethrough fluorescent X-rays generated from the sample; a spectroscopic device for monochromating the fluorescent X-rays having passed through the divergence slit; a receiving slit for passing therethrough the fluorescent X-rays having been monochromated by the spectroscopic device; a detector for detecting an intensity of the fluorescent X-rays having passed through the receiving slit; an interlocking drive device for driving the spectroscopic device, the receiving slit and the detector in association with each other so that while the wavelength of the fluorescent X-rays monochromated at a spectroscopic angle of the spectroscopic device that is changed is varied, the fluorescent X-rays so monochromated can impinge on the receiving slit and the detector; and a quantitatively analyzing device configured to perform quantitative analysis based on a result of measurement by the detector; wherein the quantitatively analyzing device calculates the concentration or the amount of deposit of hexavalent chrome based on the fact that the spectroscopic angle of the peak, at which the maximum intensity is attained in the Cr—Kα line, changes depending on a ratio of the concentration or the intensity of the hexavalent chrome vs. the concentration or the intensity of the total chrome; and wherein at least one of the divergence slit, the spectroscopic device, and the receiving slit is provided selectively in a plural number so as to form a plurality of detecting devices having different resolutions from each other as a combination of the divergence slit, the spectroscopic device, the receiving slit, and the detector, such that when a change of the peak spectroscopic angle is to be detected, a detecting device having a higher resolution than that of the detecting device, which is selected when the concentration or the intensity of the total chrome is to be determined, is selected.