the invention provides polyol polymer for electrokinetic devices . the devices can be modified for attachment of a chemical moiety or ligand . the electrokinetic devices can be used for a variety of applications , including chemical analysis , biochemical analysis , cell sorting , purification , analytical devices , diagnostic devices , and tissue culture applications . the invention also provides methods of using the polyol polymer electrokinetic devices . the invention also provides for a sensor that allows for the detection of various chemicals , biochemicals , ions , metals , solvents , and bio - polymers .