A small amount of the compound is ground to a very fine powder using a mortar and pestle.
▶ 00:07
2
Mix nujol with ground compound
A few drops of nujol are added to the powder and mixed together to create a paste.
▶ 00:25
3
Transfer paste to potassium bromide discs
The nujol paste is transferred to potassium bromide discs using the flexible end of a small spatula, taking care not to scratch the disc surface. The two discs are then pressed together to create a film.
▶ 00:43
4
Secure sample in plate holder
The pressed discs are placed into a plate holder, which uses screws or springs to hold the sample tightly in place. The screws are tightened evenly to apply pressure across the plates.
▶ 02:10
5
Prepare solution sample in vial
A small amount of compound is added to a sample vial and solvent is added to create a solution of approximately five percent concentration.
▶ 02:37
6
Transfer solution to solution cell
The solution is transferred to a solution cell (two potassium bromide plates clamped together) until all air is expelled, then sealed with small plastic plugs.
▶ 03:33
7
Insert sample holder into spectrometer
The sample holder is positioned so that the grooved edges fit snugly into the spectrometer, placing the sample directly in the path of infrared radiation for spectrum recording.
▶ 04:07
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