Additive  Function 
Organic Solvents Modify EOF
Urea Solubilize Proteins
Denature oligonucleotides
Surfactants   MECC, Separation of neutral Species
Charge reversal of Capillary Wall
Cellulose Derivatives Reduce EOF
Sieving Mechanism
Cyclodextrins Separation of Positional Isomers or enantiomers