Protection against both
contaminants and particulates
Integral leak-free design
Multiple configuration
Easy to install
Replaceable external frit
Extends column life and
savesmoney
Eliminates connecting tubing
and extra dead volume
Provides the appropriate level
of protection
Convenient, time-saving
installation
Protects column and guard
from particulates
Feature
Benefit
Features & Benefits
Trident
™
Integral HPLC
Guard Column System
OffersMaximumProtectionAgainst
Contaminants and ParticulateMatter
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
At-a-Glance
Product
Information
fromRestek
800-356-1688
814-353-1300
Hot TechTip!
High backpressure is one of themost
common problems encounteredwhen
performingHPLCanalysis.Normal
column backpressure is observed
after a new column has been installed
and equilibrated with the mobile
phase. Unfortunately, this pressure
will often increasewith use because
of particulates collecting on the
column inlet frit.
The source of these particles can be
from sample impurities,mobile phase
contaminants, and the injector or
autosampler rotor seal. The presence
of particles can result in increased
backpressure, split peaks, tailing, and
eventually over-pressure shut-down.
In some circumstances, these
problems can be corrected by back-
flushing the column. However, in
many cases it results in an unusable
column.
To reduce backpressure problems, all
samples andmobile phase solvents
must be filteredbefore use; and rotor
seals should be changed on a routine
basis. Alongwith these preventative
measures, it is advisable to use
columnprefilters such as theTri-
dent
™
column protection system.
When using a prefilter, particles
build up on its inexpensive, replace-
able frit, instead of the permanent frit
at the head of the column.
Trident™ Guard Column Protection
Systems save you time and money!
The system’s foundation consists of the analytical column configured with
our exclusive Trident
™
end fitting and XF fitting. This configuration con-
tains the standard internal frit aswell as a replaceable cap frit, which can be
easily changedwithout disturbing the packedbed. Changing the external frit
can reverse theeffectsof accumulatedparticles, suchashighbackpressureor
peak distortion. To obtain this basic configuration, simply
order any Restek
HPLC column
that has a ( -700) suffix catalog number.
For maximum protection against contaminants and particulate matter, the
system can be configured with both an integral guard cartridge and a replace-
able external frit. To obtain this configuration, simply order any Restek HPLC
column
that has a ( -700) suffix catalognumber
, theXG-XFmale fitting (cat.#
25026), and the appropriate pack of guard cartridges (see back).
XF
Fitting
Cap
Frit
End
Fitting
XF
Fitting
Cap
Frit
End
Fitting
XG-XF
Fitting
Guard
Cartridge
