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perature changes, vibrations, or other stresses nor-
mally encountered in GC analyses. The open design
allows visual evaluation of the seal between the col-
umn and the Press-Tight® union, to confirm the con-
nection. The connector is designed to hang from the
column cage, to minimize stress on the connections.
Who will benefit from using
Vu2 Union™ connectors?
Any analyst using guard columns, transfer lines, or
restrictor tubing, or performing a dual-column
analysis with columns connected in series, or seek-
ing to repair a broken column will find a Vu2
Union™ connector the simple, reliable, easy-to-use
solution to their connection need (Figure 2, page 2).
Secure, Reliable
Column-to-Column Connections
With a Vu2 Union™ Capillary
GC Column Connector•
the
800-356-1688 ★ 814-353-1300
2003 vol. 2
Advantage
Innovators of High Resolution
Chromatography Products
By Mike Goss, Instrument Innovations Team, and Donna Lidgett, GC Accessories Marketing Manager
✔ Reliable seal integrity under rapid temperature changes or other stress.
✔ Easy to use.
✔ Visually confirm the seal.
✔ Fits all fused silica tubing from 0.33mm - 0.74mm OD.*
Our new Vu2 Union™ connector combines the sim-
plicity of our Press-Tight® union with the durability
of a metal union, to reliably couple an analytical col-
umn to a transfer line, a guard column, or another
analytical column. The columns cannot unexpectedly
disconnect if the connector is bumped or vibrated,
or after repeated cycles to temperatures as high as
400ºC.
How does a Vu2 Union™ connector work?
A Press-Tight® union in the Vu2 Union™ connector
joins the fused silica ends together (Figure 1); the
ferrule and knurled nut at each end of the connector
hold the tubing in place via a secondary seal
between the ferrule and the Press-Tight® union. The
knurled nuts apply pressure to the ferrules, to make
a leak-tight seal. These ultra-strong connections will
not unexpectedly disconnect when subjected to tem-
INTERNATIONAL
•Patent pending.
*Restek 0.1mm - 0.53mm ID tubing.
in this issue
Vu2 Union™ Capillary
Column Connector
Pg. 1-2
Solvents in Cleaning
Products, by GC
Pg. 3
Resolve Trace Oxygenates
from Gasoline/Water
Pg. 4-5
Dioxins and Furans
on a Specialty GC Column
Pg. 6-7
Fast LC Analyses
Pg. 8-9
New Analytical Reference Materials
Pg. 10
Skinner List Analyses (DOMESTIC)
Pg. 11
Organophosphate Pesticides
(INTERNATIONAL)
Pg. 11
Minimize Adsorption of Active Analytes
with Drilled Uniliner® Inlet Liners
Pg. 12-13
Complex Semivolatiles Samples
Pg. 14-15
Peak Performers:
• Inlet Liners and Seals
• Detector Components
• Purge and Trap Spargers
• By-Pass Lines
Pg. 16-17
Sulfinert ™-Treated
Sample Cylinders and Valves
Pg. 18
Vespel® Ring Inlet Seals
Pg. 19-20
FREE
Vespel® Ring Inlet Seals.
See Page 19.
Figure 1 — The Vu2 Union™ connector’s open design allows visual confirmation of the
seal; secondary seals ensure a leak-tight connection
Hanger
Knurled
Nut
Body
Press-Tight® Union
Ferrule
Fused Silica Column,
Guard Column,
or Transfer Line
When should you use a Vu2 Union™ connector?
Use a Vu2 Union ™ connector when you:
● Connect a guard column to an analytical column.
● Connect a column to a transfer or restrictor line.
● Connect two columns in series.
● Repair a broken column.
Restek
Innovation!