A common 10-cm Pyrex infrared gas phase cell can be heated to a temperature of about 250°C under a vacuum of 10−4 Torr if the crystal windows are sealed to the cell body with silicone rubber. A double-beam, forced-air circulation chamber or oven has been designed
and constructed so that such cells can be used to obtain compensated high-temperature infrared spectra. The temperatures of both the sample and reference cells are essentially identical since the forced circulation in the oven achieves a thermal homogeneity over the whole interior of the oven.
The temperatures of the cells may be raised or lowered relatively rapidly without damage.
Department of Chemistry, Western Washington State College, Bellingham, Washington 98225
Publication date: January 1, 1970
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