Abstract

The preparation of films for infrared spectroscopy has previously been accomplished by adding dropwise a solution of the desired compound in a volatile solvent to the cell window. The difficulties encountered with this technique are: 1) during solvent evaporation the solute is concentrated along the edge of the film and consequently the film is not uniform in thickness; 2) the process of preparing the film is time-consuming and tedious; and 3) the compound is difficult to recover from the cell window. A new method was developed to eliminate these difficulties.

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