TABLE OF CONTENTS - BGB Analytik AG

GC and GC/MS
238
Polysiloxane Polymers Columns
Polysiloxane Polymers Columns
Polysiloxanes are the most common stationary phases. They are available in the greatest
variety and are stable, robust and versatile. Standard polysiloxanes are characterized by
the repeating siloxane backbone. Each silicon atom contains two functional groups. The type
and amount of the groups distinguish each stationary phase and its properties.
With the merger of Agilent and J&W Scientific there were many similar columns with
the same type of polymer. In some cases the manufacturing and QC processes were exactly
the same. In these cases the DB version was kept. In the cases where the HP and the DB
columns had any manufacturing or QC differences, we opted to keep both phases available
as in the case of DB-1 and HP-1. Each of these columns is a high quality product made to
meet exacting quality control testing. However, there may be some subtle performance
differences. For example the DB-35 and the HP-35 have slightly different selectivities.
Therefore, we are still offering both the DB and the HP version for our customers who
have methods already developed on these columns.
www.agilent.com/chem/supplies