| 摘要 |
Multiple internal reflection, MIR, rods or internal reflection elements, IRE, use the principal of frustrated total internal reflection, FTIR, (also known as attenuated total reflection, ATR,) in infrared spectroscopy, spectrometers, and spectrophotometers. The rods have their ends hollowed out to form a cone or wedge. A light source is located on the axis of a rod at the intersection of the perpendicular bisectors of the legs of the angle forming the cone or the faces of the wedge. Detectors are located at the intersection of these bisectors or centered on them closer to the hollowed out surfaces. The light source, under certain conditions, and the detectors may be located within the hollowed out portions. An analyzer for carbon dioxide (CO2) content of beverages is disclosed in detail.
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