| Videos: 13 results |
Chromatography
Chromatographic techniques including the gas chromatography, paper chromatography, and thin layer chromatography are demonstrated.
Chromatography |
Separation Science |
Laboratory Equipment / Apparatus
|
Centrifuging a Sample John W. Moore, Jerrold J. Jacobsen, Lois M. Browne, John F. Zimmerman
The demonstration on this page shows a technique that should not be used by undergraduate chemistry laboratory. This video shows what happens to sample in a centrifuge while the centrifuge is on, and the result of stopping the centrifuge improperly. A narrative is included in this video: The centrifuging process allows the solvent to completely settle out. The jarring caused by hand braking destroys the distinct separation between supernatant and solid.
Separation Science |
Laboratory Equipment / Apparatus
|
Centrifuge
Centrifuging safety considerations, centrifuging a sample, loading and unloading a centrifuge, removing the supernatant, and washing the precipitate are discussed and demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Extraction
Use of a separatory funnel to carry out extraction is demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Filtration
Gravity and vacuum filtration are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Recrystallization
Recrystallization procedures using a single solvent and using two solvents are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Separating and Purifying
Laboratory processes frequently used to separate mixtures or purify substances including centrifuging, chromatography, distillation, extraction, filtration, and recrystallization are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Preparation
A chromatography chamber is prepared and the sample to be separated is spotted onto paper.
Chromatography |
Laboratory Equipment / Apparatus
|
Developing the Chromatogram
Paper is placed in the chromatography tank and the chromatogram develops.
Chromatography |
Laboratory Equipment / Apparatus
|
Paper Chromatography
Techniques used in paper chromatography are demonstrated.
Chromatography |
Laboratory Equipment / Apparatus
|
Identify and Interpret
Methods to interpret the chromatogram and identify the separated spots are presented.
Chromatography |
Laboratory Equipment / Apparatus
|
Thin Layer Chromatography
Techniques used in Thin Layer Chromatography are demonstrated.
Chromatography |
Laboratory Equipment / Apparatus
|
Gas Chromatograph
Operation of a gas chromatograph is demonstrated.
Gas Chromatography |
Laboratory Equipment / Apparatus
|
