Can I use triethylamine (TEA) with a Silica-C column?

The triethylamine (TEA) additive is compatible with Silica-C™ columns in the sample diluent or mobile phase as long as the concentration is not excessive and the mobile phase pH is kept within the specifications of the column (pH must not exceed 7.0).

Specifications for Silica-C HPLC columns
More information on Cogent Silica-C HPLC columns