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Cold Pressing Solid Samples in a Wax Disk for Far Infrared Analysis

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For far ir studies of powders, it is necessary to prepare the sample in a finely divided state, and run it dispersed in some nonabsorbing medium such as a mull in Nujol or as a pressed polyethylene disk. These both have drawbacks. The mull tends to settle with time or to leak under vacuum, causing channeling. The disk works quite well if one can obtain the correct, easily pressed highly linear polyethylene such as the one recommended by Schiele and Halfar, and if one handles it with great care (it is very brittle).

Keywords: Far infrared spectroscopy; Infrared spectra of solids; Spectroscopic technique

Document Type: Research Article


Affiliations: Applied Research Division, Sun Oil Company, Marcus Hook, Pennsylvania 19061

Publication date: July 1, 1971

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