| 摘要 |
PROBLEM TO BE SOLVED: To quantitatively determine a sample in an ultratrace amount by using a spectrophotometer with good reproducibility and with ultrahigh accuracy without being influenced by a remaining liquid, by a method wherein the internal volume of a sample container which holds a sample to be measured is set in a specific range. SOLUTION: A transparent quartz translucent plate 2 on which a black mask 1 is pasted, a black quartz cell block 3, a transparent quartz translucent plate 4 and a handle 6 which comprises a through hole 5 and which uses opaque quartz constitute a sample container. The black mask 1 may be formed on the translucent plate 4. The respective components 1 to 6 are fused and bonded in such a way that an optical axis is situated in the center, and they form an ultratrace-amount sample container single-view drawing 8 indicated as a single-view drawing, A slanted line part 10 which is indicated in the enlarged figure 9 of the cell block 3 is a part which is filled with a sample, i.e., a part which decides the volume of the sample. The length of a liquid layer in the enlarged figure 9 is designated as A, the width of the liquid layer is designated as B, and the height of the liquid layer is designated as C. Then, the volume which is filled with the sample is expressed as A×B×C, and its internal volume is set at 1 to 50μL.
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