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Minimize Adsorption of
Active Analytes...
Continued from page 12
• 13 •
www.restekcorp.com2003
Volume 2
800-356-1688
Hole makes direct injection
possible with EPC-equipped
Agilent 6890 GCs!
deactivated
all liners are
Drilled Uniliner
®
Use a Drilled Uniliner
®
inlet liner with
the hole near the bottom if com-
pounds of interest will be affected by
a tailing solvent peak. Use a Drilled
Uniliner
®
inlet liner with the hole near
the top when compounds of interest
elute away from the solvent peak,
when sensitivity is critical, or when
the sample solvent is water.
Siltek
™
Deactivation—The Next Generation of Surface Passivation
• Maximizes the inertness of the sample pathway.
• Minimizes breakdown.
• Low bleed.
• Thermally stable.
• “Clean and green”—manufactured without the use of harmful organic solvents.
Restek offers the next generation of deactivation. The Siltek
™
deactivation process (patent pending) produces a
highly inert glass surface, which features high temperature stability, extreme durability, and low bleed. Try
Siltek
™
liners, guard columns, wool, and connectors for better recovery of sample analytes.
For Siltek
™
inlet liners, add the corresponding suffix number to the liner catalog number.
Siltek
™
with
Siltek
™
with
qty.
Siltek
™
Siltek
™
wool
CarboFrit
™
each
-214.1
addl. cost
-213.1
addl. cost
-216.1
addl. cost
5-pk.
-214.5
addl. cost
-213.5
addl. cost
-216.5
addl. cost
25-pk.
-214.25
addl. cost
-213.25
addl. cost
-216.25
addl. cost
Under the same conditions, a Drilled Uniliner
®
with the hole near the top produces a solvent
peak with a small tail (Figure 3c). This is
because solvent remaining within the liner,
between the hole and the column entrance, is
not swept out of the injection port when the
injector goes into the split mode. Consequently,
we recommend this liner for analyses in which
the analytes would not be affected by a solvent
tail, such as chlorinated pesticide analysis. A
Drilled Uniliner
®
with the hole near the top
will provide the best sensitivity, and is recom-
mended when sensitivity is paramount. A
Drilled Uniliner
®
with the hole near the top
also has exhibited excellent reproducibility for
analysis of glycols in water.
For accurate, reproducible, problem-free
split/splitless injections, we recommend you use
a Drilled Uniliner
®
inlet liner—and connect it
to a Restek capillary GC column.
References
1.
Operating Hints for Using Split/Splitless Injectors
Restek Corporation, Bellefonte, PA, 36pp, 2002.
(Reference free on request: cat.# 59880A)
2.
Higher Responses for Chlorinated Pesticides, Using a
Drilled Uniliner
®
GC Inlet Liner and Rtx
®
-
CLPesticides Columns
Restek Corporation, Bellefonte,
PA, 4pp, 2003.
(Reference free on request: cat.# 59487.)
New / Recent Literature
✔
Analysis of Volatile Organics - technical guide (lit. cat.# 59887A)
✔
Brominated Flame Retardants - applications note (lit. cat.# 59389B)
✔
Environmental Gas Standards - Fast Facts (lit. cat.# 59276A)
✔
EZ No-Vent
™
GC/MS Connector - new product flyer (lit. cat.# 59498)
✔
Foods Flavors & Fragrances In-Review - abstracts of Restek publications (lit. cat.# 59489)
✔
High-Resolution Analyses of FAMEs - applications note (lit. cat.# 59584A)
✔
HPLC minicatalog (lit. cat.# 59241A)
✔
Inlet Supplies - a handy guide to septa, liners, etc. (lit. cat.# 59893B)
✔
Pesticides (PCBs) / GC Racer - applications note (lit. cat.# 59457)
✔
Pinnacle
™
DB HPLC Columns - new product flyer (lit. cat.# 59499)
✔
Sample Cylinder Technology - product flyer (lit. cat.# 59618A)
✔
STAR Service Rewards - new program: earn credit toward instrument service
(lit. cat.# 59522)
✔
Vu2 Union
™
Column Connector - new product flyer (lit. cat.# 59505)
For Agilent 5890 & 6890 GCs
(0.25/0.32/0.53mm ID columns)
ID*/OD &
Length (mm)
Similar to
Agilent
cat.#
ea.
cat.#
5-pk.
Drilled Uniliner
®
(hole on top)
4.0 ID
6.3 OD x 78.5
G1544-
80730
21054
21055
Siltek
™
Drilled Uniliner
®
(hole on top)
4.0 ID
6.3 OD x 78.5
— 21054-214.1 21055-214.5
Drilled Uniliner
®
(hole on bottom)
4.0 ID
6.3 OD x 78.5
G1544-
80730
20756
20771
Double Gooseneck Drilled Uniliner
®
(hole on top)
4.0 ID
6.3 OD x 78.5
G1544-
80700
20508
20509
Double Gooseneck Drilled Uniliner
®
(hole on bottom)
4.0 ID
6.3 OD x 78.5
G1544-
80700
20954
20989
Siltek
™
1mm Drilled Uniliner
®
(hole on top)
1.0 ID
6.3 OD x 78.5
— 21390-214.1 21391-214.5
For PerkinElmer GCs
(0.32/0.53mm ID columns)
ID*/OD &
Length (mm)
Similar to
PE part#
ea.
cat.#
5-pk.
Auto SYS Drilled Uniliner
®
(hole on top)
4.0 ID
6.2 OD x 92.1
— 20819
20822
Drilled Uniliner
®
Inlet Liners
*Nominal ID at syringe needle expulsion point.