Chromatography

F324

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  • Created by: Kath
  • Created on: 01-06-14 13:24

1. What is the correct definition of an Rf value?

  • distance moved by component plus the distance moved my solvent front
  • distance moved by component divided by distance moved my solvent front
  • distance moved by solvent front multiplied by distance moved by component
  • distance moved by solvent front divided by distance moved by component
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Other questions in this quiz

2. What does a solid stationary phase separate compounds by?

  • relative solubility
  • adsorption
  • absorption

3. Which is NOT a use of GC-MS?

  • forensic analysis
  • drug testing
  • treatment of strokes
  • airport security

4. Which is NOT a limitation of thin layer chromatography?

  • similar compounds have similar retention times
  • similar compounds have similar Rf values
  • unknown compounds have no Rf value for comparison
  • may be difficult to find a solvent which will separate all components

5. What is the benefit of coupling gas chromatography with mass spectrometry

  • mass spectroscopy separates the compounds and retention times can be compared to a database
  • gas chromatography separates compounds and mass spectra can be compared to a database
  • both the retention time and mass spectra can be used to improve the reliability of the identification

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jdellams

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good quiz didnt quit understand some of the questions

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