Page 128 - Applied Pharmacognosy
P. 128

Hydrophobic Interactions

Reversed Phase

H2O H2O   If nonpolar solute    H2O  H2O H2O
               is added...
H2O                                  Nonpolar solute  H2O
     H2O
H2O H2O H2O
                                H2O  H2O  H2O

Network of hydrogen bonds       …the network is broken and...

     H2O H2O               H2O
                           H2O
H2O  H2O H2O                    …the nonpolar substance
                                is pushed to a nonpolar
      Nonpolar solute           location.

Nonpolar stationary phase                                                 127
   123   124   125   126   127   128   129   130   131   132   133