2022年5月10日 · In this context, alkali halides like potassium bromide (KBr) serve as a carrier with 100% transmittance. The major problem in mid-IR spectroscopy is the high absorbance of radiation by the sample, and this can be resolved by diluting the …

Fixed 5 mm pathlength FTIR liquid cell. This cell is used for quantitative analysis of volatile liquids and conveniently slides into the cassette holder than comes standard with all Shimadzu FTIR models. Sample is sandwiched between two KBr salt plates and the 5 mm spacer for analysis.

This Preassembled Sealed Liquid Cell is a rectangular cell with potassium bromide windows and has a 0.5 mm path length. Sealed liquid cells have a corrosion-resistant construction, making them ideal for highly volatile samples.

Cell Materials. After selecting the appropriate cell type from Table 1, aperture plates must be selected to suit the sample. The aperture cell materials described here are commonly used to measure liquid samples. Alkali halides, such as NaCl, KBr, or CsI, are often used due to their good infrared transmission.

Potassium Bromide (KBr) Windows are ideal for FTIR spectroscopy. KBr has a slightly more extensive spectral range than Sodium Chloride (NaCl) and has excellent transmission from 250nm – 26μm. Its index of refraction varies from 1.46 - 1.59 over this range. KBr is water soluble, and its surfaces should be protected from exposure to moisture.

Semi-Demountable Cell Windows are rectangular windows and come in a variety of window materials. Each window measures 41 (H) x 23 mm (W), and they come in pairs. These windows require, but do not include, the Universal Demountable Cell (L1270986).

Circular Demountable Windows are available in a variety of window materials. Samples are placed on one window and the second window is pressed lightly on top of the first. Spacers of various thicknesses can be used to vary the cell path length. These windows require, but do not include, the Universal Demountable Cell (L1270986).

Permanently sealed liquid cell, KBr, 0.5mm pathlength. For FTIR and dispersive methods. Our sealed liquid cells comprise a corrosion resistant stainless steel housing in which the cuvette is permanently mounted and sealed.

32mm Round cell window KBr, Drilled; Synonyms: 32mm Diameter Round Optical Cell Window at Sigma-Aldrich