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What is the difference between Symmetry and SymmetryShield? - WKB54099

Article number: 54099

ENVIRONMENT

  • HPLC columns
  • Symmetry 
  • SymmetryShield

ANSWER

Symmetry C8 and C18 columns are fully porous silica packings with monofunctionally bonded C8 or C18 ligands.

SymmetryShield RP8 and RP18 columns are fully porous silica packings with monofunctionally bonded C8 or C18 ligands, where each ligand contains an embedded polar group.

ADDITIONAL INFORMATION

The embedded polar groups are carbamate groups. These polar groups are embedded at the base of each ligand in the SymmetryShield packings. The embedded polar groups attract water molecules, which will shield charged silanol groups, to help lower the amount of tailing with charged basic compounds. Symmetry and SymmetryShield columns exhibit slightly different selectivities.

Waters Shield Technology: White Paper

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