Preparation of high temperature stable glass capillary columns coated with PS‐090 (20% diphenyl substituted CH3O‐terminated polysiloxane) a selective stationary phase for the direct analysis of metal‐porphyrin complexes

Abstract

AbstractIn this report we describe the coating of delonized glass surfaces with commercially available CH3O‐terminated diphenyl‐dimethylpolysiloxane (PS‐090). This new type of reactive, high temperature stable stationary phases withstands temperatures up to 430°C. As already reported for OH‐terminated polymers, the underlying stabilization process is a condensation of methoxy groups of the phase with surface silanol groups arising from high temperature silylation. The good selectivity of this medium polar coating for substrates bearing π‐electron systems is demonstrated by the separation of various metalloporphyrins.