Chemistry A-Level
lid and saturated vapour
What lid and saturated vapour means in Chemistry A-Level, as defined for AQA.
Definition of lid and saturated vapour
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Reference: AQA
The lid saturates the atmosphere with solvent vapour and stops solvent evaporating off the plate, which would otherwise distort the chromatogram.
Topics that use lid and saturated vapour
- Chromatography (A-level only) (AQA A-Level)
Related terms
- adsorption
- fragmentation fingerprint
- gas chromatography
- gas chromatography with mass spectrometry
- molecular ion peak
- pencil baseline
- retention time
- Rf value
Using lid and saturated vapour in the exam
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