RestekCorporation • (800)356-1688 • (814)353-1300 •
Trident
™
Integral HPLC Guard Column System Offers Maximum Protection
Against Contaminants and Particulate Matter
Highbackpressure is oneof themost commonproblems encounteredwhenperformingHPLC analysis.Normal column
backpressure is observed after a new column has been installed and equilibratedwith themobile phase. Unfortunately,
this pressurewill often increasewith use because of particulates collecting on the column inlet frit.
The sourceof theseparticles canbe from sample impurities,mobilephasecontaminants, and the injector or autosampler
rotorseal.Thepresenceofparticlescan result in increasedbackpressure, splitpeaks, tailing, andeventuallyover-pressure
shut-down. Insomecircumstances, theseproblemscanbecorrectedbyback-flushing thecolumn.However, inmanycases
it results in an unusable column.
Toreducebackpressureproblems,allsamplesandmobilephasesolventsmustbefilteredbeforeuse;androtorsealsshould
bechangedona routinebasis.Alongwith thesepreventativemeasures, it isadvisable tousecolumnprefilters suchas the
Trident
™
columnprotection system.Whenusingaprefilter, particlesbuildupon its inexpensive, replaceable frit, instead
of the permanent frit at the head of the column.
The system’s foundation consists of the analytical column
configured with our exclusive Trident
™
end fitting and XF
fitting. This configuration contains the standard internal frit as
well as a replaceable cap frit, which can be easily changed
without disturbing the packed bed. Changing the external frit
can reverse the effects of accumulated particles, such as high
backpressure or peak distortion. To obtain this basic configu-
ration, simply
order any Restek HPLC column
that has a
( -700) suffix catalognumber.
For maximum protection against contaminants and particulate
matter, the system can be configured with both an integral
guard cartridge and a replaceable external frit. To obtain this
configuration, simply order any Restek HPLC column
that has
a ( -700) suffix catalog number
, the XG-XFmale fitting (cat.#
25026), and the appropriate pack of guard cartridges (see right).
Trident
™
HPLCGuard Column Fittings and Frits
Description
cat.#
XG-XF Fitting for 1cm Guard Cartridge
25026
Replacement XF Filter Fitting
25024
Replacement Cap Frits, 2µm
25022
Replacement Cap Frits, 0.5µm
25023
Trident
™
HPLCGuard Column Cartridges
(10 x 2.1mm) (10 x 4.0mm)
Guard Cartridge
cat.#
cat.#
Allure
™
Acidix
916250212 916250210
Allure
™
Basix
916150212 916150210
Allure
™
C18
916450212 916450210
Allure
™
Silica
916050212 916050210
Ultra Amino
910750212 910750210
Ultra C1
910150212 910150210
Ultra C4
910250212 910250210
Ultra C8
910350212 910350210
Ultra C18
917450212 917450210
Ultra Cyano
910650212 910650210
Ultra IBD
917550212 917550210
Ultra Phenyl
910550212 910550210
Ultra Silica
910050212 910050210
XF
Fitting
Cap
Frit
End
Fitting
XF
Fitting
Cap
Frit
End
Fitting
XG-XF
Fitting
Guard
Cartridge
