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Figure 4: Peak shape comparison of a basic compound on various brands of GC
columns.
Competitor F
Competitor A
Competitor B
Rxi
® -5ms
Competitor E
Competitor C
Competitor D
Figure 5: Rxi® columns have the lowest bleed among all major brands of columns.
Competitor D
Competitor B
Competitor C
Competitor A
Comparison of 30 m x 0.25 mm ID,
0.25 µm 5% diphenyl columns at 330 °C
through 350 °C; hydrogen carrier gas;
flame ionization detection.
Competitor E
Competitor F
GC COLUMNS | HIGH-PERFORMANCE Rxi® COLUMNS
Rxi® Columns Overview
Bench marking shows that Rxi® columns
provide superior peak symmetry and
response for difficult-to-analyze compounds.
Comparison of 30 m x 0.25 mm ID, 0.25 µm 5% diphenyl columns, 2 ng pyridine on-column, helium carrier gas,
Oven temp.: 50 °C (3 min) to 180 °C @ 35 °C/min (5 min), Det.: FID@ 250 °C
Innovation & Service
“When my research group
needed a GC column for a
chiral separation, Restek was
the only company that offered
to provide us with test columns
to evaluate. The willingness of
Restek to work with us to find
a solution to our separation
problem is exceptional.”
Joe Dinnocenzo,
Professor of Chemistry
Director, Center for
Photoinduced Charge Transfer
University of Rochester
How can we help you today?
Contact
or your local Restek represen-
tative for helpful, knowledge-
able technical support.
0 2 4 6 8 10 12 14 16 18 20 22 24
Time (min)
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
GC_EV00822
Reference Peak
1 ng tridecane
Rxi®-5ms
pA
330 °C
350 °C
Lowest Bleed
Rxi® columns are more stable at high temperatures than other manufacturers’ columns, resulting in higher system sensitivity
(Figure 5). This low-bleed characteristic is the result of superior stabilization achieved by optimizing polymer cross-linking and
surface deactivation technologies. Benefits of using ultra-low bleed Rxi® columns include the following:
• Increased sensitivity, for lower detection limits and better matches to mass spectral libraries.
• Faster system stabilization.
• Reduced detector contamination results in less downtime for maintenance.
Improve sensitivity and accuracy at trace
levels with low bleed Rxi® columns.