Deactivated capillary columns, precolumns, Phe-Sil, low–medium polar

Deactivated capillary columns (precolumns) with phenylmethyl (low-medium polar) surface for protection of the analytical column against contamination and extend its lifetime. Me-Sil is more inert than Phe-Sil, while Phe-Sil is less susceptible to contamination.