Flashcards
Chromatography
Flashcards do conjunto (7)
- 1What is chromatography used for?To separate components in a mixture
Once separated, each component can be identified - 2What is the basic set up of chromatographyMobile phase (where molecules can move)
Stationary phase (where molecules cannot move) - 3What is the mobile phase in paper and TLC?Liquid solvent (e.g. ethanol or water)
- 4What is the stationary phase in paper chromatography?A piece of chromatography paper
- 5What is the stationary phase in TLC?Thin layer of solid (e.g. silica gel, on a glass or plastic plate)
- 6What is the basic principle of chromatography?1. Mobile phase moves through or over stationary phase
2. Components spend different amounts of time in mobile phase and stationary phase
3. Components that spend longer in the mobile phase travel faster/further
4. Time spent in different phases is what separates out the components - 7How is the Rf value calculated?Rf value = Distance travelled by spot / Distance travelled by solvent
Informações
- Descrição
- O usuário eliminou as informações de disciplina FlashCards sobre Chromatography, criado por Usuário eliminado em 05-03-2018.
- Criado por
- Usuário eliminado · mar 2018
- Atualizado
- 5 mar 2018
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- 23
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- Criado por Yinka F · 24 jan 2018
- Copiado por Yinka F · 5 mar 2018
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