chromatography lec.2

The substance in the mixture that has the greatest affinity for the mobile phase will travel

• fastest

• slowest

The retention factor is used

• to retain solvent

• to identify uknown compounds in a sample

• as a starting tool for chromatography

The larger "K" value denotes

• Faster separation

• slower separation

• higher concentration in the mobile phase

A high Rf and low Rt means that the compound has

• greater affinity to the stationary phase

• greater affinity to the mobile phase

mobile phase that  has more affinity to the adsorbent  than the solvent but less than the  solutes (it allows the solutes to  move)

• solvent

• developer

• eluent

It has more eluting power than  the developer and can take  solutes out of the surface of the  adsorbent.

• solvent

• developer

• eluent