Introduction to Chromatography

Chromatography is a physical method that is used to separate and analyse __________

• Simple mixtures

• Complex mixtures

• Viscous mixtures

• Metals

Which of the following can the mobile phase be made of in chromatography?

• Solid or liquid

• Liquid or gas

• Gas only

• Liquid only

Chromatography cannot be used to separate delicate products.

• True

• False

Pattern on paper in chromatography is called ________

• chroming

• chroma

• chromatograph

• chromatogram

The time taken by the analyte after sample injection is called ______

• dead time

• solute migration time

• retention time

• extraction time

Name the first person who reported chromatographic separation.

Which of the following is NOT a feature of carrier gas used in gas chromatography?

• It must be chemically inert.

• It should be suitable for the detector employed.

• It should not be completely pure.

• It should be cheap.

Which of the following compounds would you expect to elute first from a nonpolar gas chromatographic column?

• Methanol (CH3OH)

• Ethanol (CH3CH2OH)

• n-Propanol (CH3CH2CH2OH)

• n-butanol (CH3CH2CH2OH)

Which of the following is NOT a common detector for gas chromatography?

• Flame ionisation detector

• Refractive index detector

• Thermal conductivity detector

• Mass spectrometry

A characteristic feature of any form of chromatography is the _______

• use of an inert carrier gas.

• use of molecules that are soluble in water.

• calculation of an Rf values.

• use of a mobile and a stationary phase.