ES Industries manufactures Polar Bonded materials for Normal Phase HPLC that are compatible with most organic solvents. These phases often give more reproducible separations than adsorption silica columns. All our Polar Bonded phases are produced on ultrahigh purity silica.
| Phase |
Phase Description |
Preferred Application |
| A |
Amino (NH2) |
Amino packing separates polar compounds such as substituted anilines, esters,
and chlorinated pesticides |
| DA |
Diamine |
Same as amino but greater concentration of amino groups |
| TA |
Triamine |
Even higher loading of amino groups than diamine |
| D |
Diol |
Less polar than unmodified silica. Can produce better peak shapes than silica. |
| CN |
Cyano (CN) |
Cyano separates many of the same polar compounds as unmodified silica |
| CN/HS |
Cyano |
Same as cyano but higher surface area |
| A/CN |
Amino/Cyano |
A mixed cyano-amino phase may be used as an alternative to cyano phases |
| NO2 |
Nitro |
Separation of compounds with double bonds, e.g. aromatic compounds |
