Water-insoluble infrared-transparent

Vibrational microspectrometry will undoubtedly be applied to medical diagnosis in the near future. One particularly important application of microspectrometry is for the characterization of tissue samples. Tissue samples can be mounted on a water-insoluble infrared-transparent window such as ZnSe, but these windows are expensive and not conducive to visual examination (e.g., after staining of the tissue). A convenient alternative to transmission spectrometry is the measurement of the transflectance spectrum (see Section 13.5) of tissue samples mounted on low-emissivity glass slides [4]. These slides are transparent to visible light but highly reflective to mid-infrared radiation. 

Hi) F. The flow cell would have to be made from a water insoluble material that is transparent to infrared radiation, eg KRS5 (TIBr/Tll). Glass cannot be used for optical components in ir instruments, as it absorbs ir radiation. 

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