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New
Rxr
Fused Silica Columns
Ultimate High -Performance Fused Silica Capillary Columns
• Unsurpassed inert ness for low-level acidic and basic compounds.
• Ultra -low bleed.
• Reliable performance, guaranteed column to column reproducibility.
Guaranteed to work perfectly with retention time-locking software.
In recent years there have been few advances in capillary GC colum n technology. Thro ugh new, innova
tive techn ology, Restek has developed and optimized a column-maki ng procedure that assures low bleed,
unsurpassed iner tness, and exceptio nally repro ducible columns , batch to batch.
Unsurpassed Inertness
Rxi"
columns improve chro ma togra phy for many acidic or basic compo unds. Surface activity in a col
umn is revealed by the sensitivity and peak shap es for analytes such as 2,4-dinitrophenol (acidic) and
pyridine (basic). Sub-nanogram quantities of these compounds are a stringent test of inertness. Rxi"
columns' un surpassed iner tness allows analysis of acidic or basic compoun ds under the same conditions,
as shown here.
Figure 1
Rxi"-Sms columns have excellent sensitivity and symmetry for difficult compounds.
pyridine
2,4-dinitrophenol
m/z~IB4,
107
benzo(k)II
u
ora
n
thene
/'
benzo(b)fluoranthene
N'nitrosodimethylamine
l,4-dioxane
7.00 7.10 7.20 7.30
2.20 2.30 2.40 2.50
. -!. , .\-.
15.10 15.20 1530 15.40
GC..EV00821a
GCEVOOB21b
GC.EV00820a
Ultra-Low Bleed
Bleed from
Rxi"
columns is the lowest in the industr y, simplifying trace-level analysis with mass spectro
metric detectors (MSD, ion trap, etc.), electron capture detection (ECD ), nitrogen -phosphorus detection
(NPD), or oth er sensitive detection methods.
Figure 2
Profiles for Widely used columns prove Rxi'-Sms has the lowest bleed!
r
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+
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+ ;
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350'~
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i
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Rxi*-Sms i
.. ... ...,...... . ............1
...... .;.........:;#, - -
i l '
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12
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IB
20
2006 vol, 1
• 3 •
Introducing...
Restek's exceptionally
inert(Rxi) fused silica
capillary columns:
In addition to bleed,
column-to-column uniformity
has beenelusive- see
editorial
The "Replacement"
ColumnARecurring Problem
in Gas Chromatography,
by
guest editor ProfessorWalter
Jennings, onthefacingpage.
The processes weuseto
make new Rxi" columns
enable us to guarantee highly
uniform performance, column
to column and lot to lot,
including perfect match-up
with retention time-locking
software.
It
is our promise
and commitment to you that
every Rxi'· column you receive
will be exactly as good as the
oneit replaces.
Continued
on
the
outside back cover.
Website :
www.chromtech.net.auE-mail :
info@chromatech.net.auTelNo : 03 9762 2034 . . . in AUSTRALIA