Separating Mixtures with Chromatography
A way to separate mixed components
0:53 · 720p · With AI narration and captions. This sample was made with the same system as this service.
Narration (full text)
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Chromatography
Chromatography is a way to separate a mixture into its components. Let's see how it works.
Paper and Solvent
Put a dot of black ink on paper, and dip the bottom edge in a solvent. As the solvent soaks up the paper, the dot separates into several colors.
Stick or Flow
Components that stick to the paper easily don't travel far. Those easily swept along by the solvent are carried farther. This difference separates them.
Rf Value
The distance a component travels, divided by the distance the solvent front travels, is called the Rf value. It's a clue for identifying components.
In a Column, Too
The same principle is used in column chromatography, with a tube full of packing, and in instruments that analyze components.
Separating by Stickiness
Chromatography separates mixtures by using the differences in how easily each component sticks.
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