| 摘要 |
A sample cell (100) for use in spectroscopy includes two cell portions (48, 52) that are mutually adjustable to enable a user to vary the cross-sectional geometry of sample cell flow path (16) between at least two discrete configurations. In a first position, the flow path has a small cross-sectional area to provide a smallpathlength and generate high velocity fluid flow therethrough. This enables use of small sample volumes and facilitates optical measurement of turbid samples, e.g. blood. In a second position, the flow path has a larger cross section to permit clots to pass through the flow path and to facilitate cleaning. Adjustment of the flow path is accomplished by sliding movement of the cell portions relative to one another. In one embodiment, planar mating surfaces (49, 53) slide relative to one another. In another embodiment, the mating surfaces (249, 253) are superposed in spaced relation and distance therebetween varied. |
