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Lowest Bleed 624 Available—Assured GC/MS Compatibility
In addition to providing higher inertness and more accurate quantification of active
compounds, Rxi®-624Sil MS columns offer greater thermal stability, resulting in lower
bleed than any column in its class (Table I, Figure 3). While other 624 columns generate
too much bleed to be useful for mass spec work, the Rxi®-624Sil MS column is fully
compatible with mass spectrometry. Other benefits related to thermal stability include
stable baselines, longer column lifetime, and improved method reproducibility.
Column Manufacturer Maximum Programmable Temperature
Rxi-624Sil MS Restek 320 ºC
VF-624ms Varian 300 ºC
DB-624 Agilent J&W 260 ºC
ZB-624 Phenomenex 260 ºC
Column: 30 m, 0.25 mm ID, 1.4 µm (Columns are of equivalent dimensions and were tested after equivalent conditioning)
Sample: Fluorobenzene in methanol, 10 ng on-column; Detector: FID @ 250 °C. Complete analytical conditions for
chromatogram GC_GN1147 available at
GC_GN1147
Figure 3 The Rxi®-624Sil MS column has the lowest bleed of any column in its class
and provides true GC/MS capability.
ID df (µm) temp. limits length cat. #
0.18mm 1.00 -20 to 300/320°C 20-Meter 13865
0.25mm 1.40 -20 to 300/320°C 30-Meter 13868
0.32mm 1.80 -20 to 300/320°C 30-Meter 13870
0.32mm 1.80 -20 to 300/320°C 60-Meter 13872
0.53mm 3.00 -20 to 280/300°C 30-Meter 13871
Rxi®-624Sil MS Columns (fused silica)
(mid polarity Crossbond® silarylene phase; equivalent to
6% cyanopropylphenyl/94% dimethyl polysiloxane)
Visit
for detailed comparisons
and to learn how exceptional
Rxi® inertness, bleed, and
reproducibility can improve
your data.
Make your next Volatiles Column an Rxi®-624Sil MS Column
You can get more accurate low level results for volatile organics with a mass spec com-
patible Rxi®-624Sil MS column. See our articles in this issue for pharmaceutical (p. 4)
and environmental (p. 6) applications, or contact us to discuss your own method needs.
Table I The Rxi®-624Sil MS column has the highest thermal stability of any 624 column.
3
200°C Hold 260°C Hold 300°C Hold
High thermal stability Rxi®-624Sil MS columns offer:
• Longer column lifetime. • GC/MS compatibility.
• Improved method reproducibility. • Stable baseline.
Data obtained from company website or literature for a 30 m x 0.25 mm x 1.4 µm df column.
Website : E-mail : TelNo : 03 9762 2034 . . . in AUSTRALIA