Rigaku Corporation

Rigaku Industrial Corporation

Takao Moriyama

Yoshiyuki Kataoka

Michiko Inoue

An X-ray fluorescence spectrometer of the present invention includes a counting time calculation unit () configured to: by a predetermined quantitative calculation method, determine each of quantitative values by using reference intensities of one standard sample and repeatedly perform a procedure of determining each of the quantitative values in a case where only a measured intensity of one of measurement lines is changed by a predetermined value, to calculate a ratio of a change in each of the quantitative values to the predetermined value as a quantitative-value-to-intensity change ratio, the one of the measurement lines having the measured intensity to be changed being different on each repetition of the procedure; and use quantitative-value-to-intensity change ratios calculated thereby for all the measurement lines to calculate a counting time for each of the measurement lines from a quantification precision specified for each of the quantitative values.

X-ray fluorescence spectrometer

To provide a sample retainer for X-ray fluorescence analysis, which is used in pretreating a liquid sample and then in X-ray fluorescence analysis of contents of such liquid sample, can sufficiently improve the limit of detection by suppressing the background and, also, allowing the fluorescent X-rays of a high intensity to be emitted uniformly, the sample retainercomprises a ring-shaped pedestal; a hydrophobic filmof a thickness smaller than 10 &#x3bc;m and having a peripheral portionheld by the pedestal and also having a transmitting portionfor passage of X-rays therethrough; and a sheet-like liquid absorbent elementapplied to the transmitting portionof the hydrophobic filmand having a thickness within the range of 1 to 100 &#x3bc;m; wherein a liquid sampleis adapted to be dispensed dropwise onto and dried on the liquid absorbent elementwith contents of the liquid sampleconsequently retained thereon.

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Takatsuki, Japan

Takao Moriyama