Rigaku Industrial Corporation

Michiko Inoue

Takao Moriyama

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

Michiko Inoue