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UltraLine UHPLC In-Line Filter
Description qty. cat.#
UltraLine UHPLC In-Line Filter
(In-Line Assembly with Filter) ea. 24993
UltraLine Replacement Filters 5-pk. 24994
UltraShield UHPLC PreColumn Filter
NEW!
• Cost-effective protection for UHPLC systems.
• Reliable way to extend column lifetime.
• Leak-tight to 15,000 psi.
UHPLC Filters
15
Figure 1: Restek columns offer the widest range of unique and effective column chemistries to aid the
chromatographer in fast and easy method development.
Restek phase
(column class)
Aqueous C18 (alkyl) IBD (polar embedded) Biphenyl (phenyl) PFP Propyl (fluorophenyl)
Ligand type Proprietary polar modified
and functionally bonded C18
Proprietary polar functional
embedded alkyl
Unique Biphenyl Proprietary end-capped
pentafluorophenyl propyl
Characteristics
and uses
• C18 phase for balanced
retention of multiple solute
types.
• Compatible with up to
100% aqueous mobile
phases.
• Enhanced retention of
polar acids.
• Moderate retention of
both acidic and basic
solutes.
• Increased retention of
aromatic, unsaturated,
conjugated solutes, or
solutes containing an
electron withdrawing
ring substituent.
• Enhanced retention and
selectivity when used with
methanolic mobile phases.
• Increased retention of
protonated bases and
solutes containing
aromatic moieties.
Si
OO
P Si CH3 CH3
O
Si CH3 CH3
O
F
F
F F
F
USLC™ Columns: Selectivity Choices Optimize Separations
Restek USLC™ columns, available in both HPLC and UHPLC formats, offer the widest range
of selectivities available and are an integral part of successful method development. Ideal
for column switching systems, these columns provide the orthogonal separations needed
to create optimal resolution and robust methods. Combining USLC™ phases with a suitable
column format gives practicing chromatographers the most powerful tool available for suc-
cessful method development.
Figure 2 Restek has extended the selectivity range for reversed phase separa-
tions as illustrated by the hydrophobic-subtraction model and corresponding
selectivity (S) value.
References
1. L.R. Snyder, J.W. Dolan, P.W. Carr, J. Chromatogr. A 1060 (2004) 77.
2. U.D. Neue, J.E O’Gara, A. Mendez, J. Chromatogr. A 1127 (2006) 161.
We’re here to help!
To discuss the right selectivity
for your separation or to find a
comparable column, contact
us at
or 800-356-1688.
Description qty. cat.#
UltraShield UHPLC ea. 24995
PreColumn Filter 5-pk. 24996
10-pk. 24997
CH 3 CH3
O
Si
P
Website : E-mail : TelNo : 03 9762 2034 . . . in AUSTRALIA