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Chromatography (A-level only) key terms
Use these key terms for Chromatography (A-level only) in AQA Chemistry 7405. The page is built from approved learning objectives for this topic and links back to the wider unit, topic hub, and related revision assets.
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key terms
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Topic
Chromatography (A-level only)
Key terms
stationary phase
The phase in chromatography that remains fixed in place while the mobile phase moves through it.
mobile phase
The phase in chromatography that moves and carries the components of the mixture through the stationary phase.
Rf value
The ratio of the distance traveled by a compound to the distance traveled by the solvent front in chromatography.
Rf value
The ratio of the distance travelled by the substance to the distance travelled by the solvent front in chromatography.
stationary phase
The phase in chromatography that remains fixed in place while the mobile phase moves through it.
mobile phase
The phase in chromatography that carries the substances to be separated through the stationary phase.
chromatogram
A visual representation of the separation of components in a mixture, showing the position of each component at a specific retention time.
retention time
The time taken for a component to travel through the chromatography system to the detector, indicating its interaction with the stationary phase.
Rf value
The ratio of the distance travelled by a component to the distance travelled by the solvent front, used to identify substances in chromatography.
chromatography
A technique used to separate and analyze components in a mixture based on their movement through a stationary phase while being carried by a mobile phase.
stationary phase
The phase in chromatography that remains fixed in place, allowing the separation of components based on their affinity to this phase.
mobile phase
The phase in chromatography that moves through the stationary phase, carrying the components of the mixture with it.
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